Rheumatoid factor test cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 50 hospitals list a cash price for rheumatoid factor (RF) test: from $5.00 to $191.80, with a median of $37.50. The lowest listed price is at Uchicago Medicine AdventHealth Hinsdale and 5 other hospitals — $32.50 less than the median here. Across Illinois, the median is $37.50 at 65 hospitals.
Cash prices at 50 facilities across 35 cities for code 86431, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 17, 2025 and Sep 1, 2026.
Lowest$5.00Uchicago Medicine AdventHealth Hinsdale + 5 more
Median$37.50half pay less
Highest$191.80in this market
Difference38.4×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Chicago-Naperville-Elgin, IL-IN.
median
Lowest $5.00Highest $288.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Mercy Medical Center lowest Aurora, IL · (630) 859-2222 RHEUMATOID FACTOR, BF | $5.00 | $20.00 | $3.40–$147.00 | 75% | Sep 1, 2026 source file |
| Mercy Medical Center lowest Aurora, IL · (630) 859-2222 RHEUMATIOD FACTOR, BODY FLUID | $5.00 | $147.00 | $3.40–$147.00 | 97% | Sep 1, 2026 source file |
| Mercy Medical Center lowest Aurora, IL · (630) 859-2222 RHEUMATOID FACTOR QUANT | $5.00 | $147.00 | $3.40–$147.00 | 97% | Sep 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Saint Francis Hospital lowest Evanston, IL · (847) 316-4000 HC RHEUMATOID FACTOR, QUANT | $5.00 | $175.00 | $3.40–$145.25 | 97% | Sep 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - LUPUS COMPREHENSIVE REFLEXIVE PANEL - ARUP | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR, BODY FLUID | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR | $5.00 | $20.00 | — | 75% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) | $9.10 | $13.00 | $2.16–$13.00 | 30% | Apr 1, 2026 source file |
| Roseland Community Hospital Association Chicago, IL · (773) 995-3000 Rheumatoid factor level | $11.72 | $7.00 | $3.50–$11.72 | -67% | Jul 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $1.66–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $3.98–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $4.39–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $4.63–$24.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $3.84–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $10.08–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $3.58–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) | $16.80 | $24.00 | $4.56–$24.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) | $17.50 | $25.00 | $4.83–$25.00 | 30% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP | $22.50 | $90.00 | — | 75% | Apr 1, 2026 source file |
| Gottlieb Memorial Hospital Melrose Park, IL · (708) 681-3200 Rheumatoid Factor Qt | $26.22 | $138.00 | $58.79–$115.64 | 81% | Mar 31, 2026 source file |
| Humboldt Park Health Chicago, IL · (773) 292-8200 Rheumatoid factor level | $26.75 | $95.55 | $95.55 | 72% | Aug 24, 2026 source file |
| Loyola University Medical Center Maywood, IL · (708) 216-9000 Rheumatoid Factor Qt | $31.74 | $138.00 | $69.00–$145.45 | 77% | Mar 31, 2026 source file |
| La Rabida Children's Hospital|LaRabida Childrens Hospital Chicago, IL · (773) 363-6700 RHEUMATOID FACTOR | $37.01 | $37.01 | — | — | Apr 1, 2026 source file |
| Advocate Good Samaritan Hospital Downers Grove, IL · (630) 275-5900 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate Lutheran General Hospital Park Ridge, IL · (847) 723-2210 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$66.75 | 50% | Nov 4, 2025 source file |
| Advocate Illinois Masonic Medical Center Chicago, IL · (773) 975-1600 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$61.05 | 50% | Nov 4, 2025 source file |
| Advocate Sherman Hospital Elgin, IL · (847) 742-9800 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$67.50 | 50% | Nov 4, 2025 source file |
| Advocate Trinity Hospital Chicago, IL · (773) 967-5002 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate Condell Medical Center Libertyville, IL · (847) 362-2900 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate Christ Medical Center Oak Lawn, IL · (708) 684-8000 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Park Ridge Park Ridge, IL RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$66.75 | 50% | Nov 4, 2025 source file |
| Advocate Childrens Hospital Oak Lawn Oak Lawn, IL RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate Good Shepherd Hospital Barrington, IL · (847) 381-9600 RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$60.00 | 50% | Nov 4, 2025 source file |
| Advocate South Suburban Hospital Hazel Crest, IL RHEUMATOID FACTOR QUANTITATIVE | $37.50 | $75.00 | $5.67–$73.05 | 50% | Nov 4, 2025 source file |
| Community First Medical Center Chicago, IL · (773) 282-7000 Rheumatoid factor level | $41.88 | $83.75 | $4.75–$83.75 | 50% | Apr 1, 2026 source file |
| Shriners Childrens - Chicago Chicago, IL · (773) 622-5400 RHEUMATOID FACTOR LEVEL | $53.50 | $53.50 | $5.04–$10.71 | — | — source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) | $53.90 | $77.00 | $12.32–$77.00 | 30% | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Quantitative-Laf | $54.00 | $54.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $15.01–$82.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $13.12–$82.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $13.12–$82.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $13.12–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $12.22–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $15.58–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $15.83–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $12.22–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $15.83–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $15.83–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $15.58–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $15.58–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $13.61–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $13.61–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $12.22–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $13.61–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $15.01–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $34.44–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $15.01–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $34.44–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $34.44–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Avise Rheumatoid Factor Quant Igm (Exa) | $57.40 | $82.00 | $5.66–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Avise Rheumatoid Factor Quant Iga (Exa) | $57.40 | $82.00 | $5.66–$82.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc) | $57.40 | $82.00 | $5.66–$82.00 | 30% | Apr 1, 2026 source file |
| Presence Saint Joseph Hospital - Chicago Chicago, IL · (773) 665-3000 HC RHEUMATOID FACTOR - RA TEST | $57.75 | $175.00 | $5.67–$23.16 | 67% | — source file |
| Presence Saint Joseph Hospital - Chicago Chicago, IL · (773) 665-3000 HC RHEUMATOID FACTOR - RA TEST | $57.75 | $175.00 | $5.67–$23.16 | 67% | — source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $15.56–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $5.87–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $5.87–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Factor (Q) | $59.50 | $85.00 | $5.87–$85.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $13.60–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $16.41–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $14.11–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $16.15–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $12.67–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $12.67–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) | $59.50 | $85.00 | $35.70–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Factor (Q) | $59.50 | $85.00 | $12.67–$85.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $5.93–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $12.81–$86.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $13.76–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $36.12–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $16.34–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $16.60–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $14.28–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) | $60.20 | $86.00 | $15.74–$86.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Factor (Q) | $61.60 | $88.00 | $16.98–$88.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $37.80–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $17.10–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $17.10–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $17.10–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $13.41–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $13.41–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $13.41–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $13.41–$90.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $14.40–$90.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $14.40–$90.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $14.40–$90.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $14.40–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $6.21–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $6.21–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $6.21–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $16.47–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $16.47–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $6.21–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $37.80–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $16.47–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $37.80–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $17.10–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $16.47–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $37.80–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $14.94–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $14.94–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $14.94–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $14.94–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc) | $63.00 | $90.00 | $17.37–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc) | $63.00 | $90.00 | $17.37–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup) | $63.00 | $90.00 | $17.37–$90.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Radx6 Profile, Rheumatoid Factor (Lc) | $63.00 | $90.00 | $17.37–$90.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) | $66.50 | $95.00 | $15.20–$95.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) | $67.90 | $97.00 | $17.75–$97.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) | $67.90 | $97.00 | $6.69–$97.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $69.30 | $99.00 | $19.11–$99.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Marianjoy Rehabilitation Hospital Wheaton, IL HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $69.30 | $99.00 | $41.58–$99.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $69.30 | $99.00 | $15.84–$99.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $69.30 | $99.00 | $16.43–$99.00 | 30% | Apr 1, 2026 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 Rheumatoid Arthritis Factor SO | $69.67 | $204.92 | $4.55–$133.20 | 66% | Mar 17, 2025 source file |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 Rheumatoid Factor | $69.67 | $204.92 | $4.55–$133.20 | 66% | Mar 17, 2025 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $76.30 | $109.00 | $16.24–$109.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Rheumatoid Factor (Rf), Quantitative | $76.30 | $109.00 | $19.95–$109.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Rheumatoid Factor (Rf), Quantitative | $77.00 | $110.00 | $20.90–$110.00 | 30% | Apr 1, 2026 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 Rheumatoid Factor | $79.33 | $233.33 | $4.55–$151.66 | 66% | Mar 17, 2025 source file |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 Rheumatoid Arthritis Factor SO | $79.33 | $233.33 | $4.55–$151.66 | 66% | Mar 17, 2025 source file |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Rheumatoid Factor Quant* | $84.50 | $130.00 | $17.55–$70.98 | 35% | — source file |
| NorthShore University HealthSystems Highland Park Hospital Highland Park, IL Rheumatoid Factor Quant* | $84.50 | $130.00 | $17.55–$70.98 | 35% | — source file |
| NorthShore University HealthSystems Evanston Hospital Evanson, IL · (847) 570-2000 Rheumatoid Factor Quant* | $84.50 | $130.00 | $17.55–$70.98 | 35% | — source file |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Rheumatoid Factor Quant* | $84.50 | $130.00 | $17.55–$70.98 | 35% | — source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Rheumatoid Factor (Rf), Quantitative | $85.40 | $122.00 | $18.18–$122.00 | 30% | Apr 1, 2026 source file |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Rheumatoid Factor (Rf), Quantitative | $98.00 | $140.00 | $22.40–$140.00 | 30% | Apr 1, 2026 source file |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) | $106.40 | $152.00 | $22.65–$152.00 | 30% | Apr 1, 2026 source file |
| Edward Hospital Naperville, IL · (630) 527-3000 HC RHEUMATOID FACTOR QUANTITATIVE | $112.00 | $112.00 | — | — | Apr 1, 2026 source file |
| Elmhurst Memorial Hospital Elmhurst, IL · (331) 221-1000 HC RHEUMATOID FACTOR QUANTITATIVE | $112.00 | $112.00 | — | — | Apr 1, 2026 source file |
| Northwest Community Hospital Arlington Heights, IL · (847) 618-1000 Hb Rheumatoid Factor Quant | $123.00 | $123.00 | — | — | Apr 1, 2026 source file |
| Endeavor Health Clinical Operations Highland Park, IL HB RHEUMATOID FACTOR, QUANT* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB RHEUMATOID FACTOR, QUANT* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB RHEUMATOID FACTOR, QUANT* | $130.00 | $130.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Rheumatoid Factor (Rf), Quantitative | $144.20 | $206.00 | $14.21–$206.00 | 30% | Apr 1, 2026 source file |
| Ann & Robert H. Lurie Children's Hospital of Chicago Chicago, IL · (312) 227-4000 RHEUMATOID FACTOR QUANT SERUM | $147.00 | $210.00 | $35.70–$8,500.00 | 30% | — source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Iga | $159.00 | $159.00 | — | — | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Igm | $159.00 | $159.00 | — | — | Apr 1, 2026 source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Igg | $159.00 | $159.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) | $160.30 | $229.00 | $15.80–$229.00 | 30% | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Rheumatoid Factor; Igg | $163.00 | $163.00 | — | — | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Rheumatoid Factor; Igm | $163.00 | $163.00 | — | — | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Rheumatoid Factor; Iga | $163.00 | $163.00 | — | — | Apr 1, 2026 source file |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Rheumatoid Factor; Quantitative | $163.00 | $163.00 | — | — | Apr 1, 2026 source file |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Rheumatoid Factor (Rf), Quantitative | $179.90 | $257.00 | $49.60–$257.00 | 30% | Apr 1, 2026 source file |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Rheumatoid Factor (Rf), Quantitative | $179.90 | $257.00 | $42.66–$257.00 | 30% | Apr 1, 2026 source file |
| The Methodist Hospitals Gary, IN · (219) 886-4000 Rf Titer | $191.80 | $274.00 | $5.67–$243.86 | 30% | — source file |
| The Methodist Hospitals Merrillville, IN Rf Titer | $191.80 | $274.00 | $5.67–$243.86 | 30% | — source file |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Quantitative | $288.00 | $288.00 | — | — | Apr 1, 2026 source file |
Outpatient: lowest $5.00, median $37.50, highest $191.80 — a 38.4× difference within the same market.
As an inpatient, the same code is billed by 32 facilities here, median $45.75. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 30 of 37 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 it is below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
Rheumatoid factor is an antibody found in many people with rheumatoid arthritis. The test is part of the workup for joint pain and swelling.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.
2 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 86431 ($38.28). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Gottlieb Memorial Hospital Melrose Park, ILEwc - Lab Raf (Rheumatoid Factor) | $0.01 | file |
| Loyola University Medical Center Maywood, ILEwc - Lab Raf (Rheumatoid Factor) | $0.01 | file |