Rheumatoid factor test cost in Chicago, IL
In Chicago-Naperville-Elgin, IL-IN, 60 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 Mercy Medical Center and 6 other hospitals — $32.50 less than the median here. Across Illinois, the median is $62.61 at 110 hospitals.
- The median here, $37.50, is 7% below the US median of $40.48.
- That is 6.6× Medicare's 2026 national rate for the same service ($5.67).
- 12 of 60 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 60 facilities across 44 cities for code 86431, as an outpatient — the setting a self-pay patient normally buys. Collected Nov 9, 2026; the hospital files themselves were last updated between Jan 1, 2025 and Nov 6, 2026.
Lowest$5.00Mercy Medical Center + 6 more
Median$37.50half of hospitals charge 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 |
|---|---|---|---|---|
| Mercy Medical Center lowest Aurora, IL · (630) 859-2222 RHEUMATIOD FACTOR, BODY FLUID+2 more lines at this price File of Sep 1, 2026 · source file | $5.00 | $147.00 | $3.40–$147.00 | 97% |
| Uchicago Medicine AdventHealth Hinsdale lowest Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP+4 more lines at this price File of Apr 1, 2026 · source file | $5.00 | $20.00 | — | 75% |
| Saint Joseph Medical Center - Joliet lowest Joliet, IL · (815) 725-7133 RHEUMATIOD FACTOR, BODY FLUID+2 more lines at this price File of Sep 1, 2026 · source file | $5.00 | $148.00 | $3.40–$148.00 | 97% |
| Uchicago Medicine AdventHealth Glenoaks lowest Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR, QUANT - RHEUMATOID FACTOR+4 more lines at this price File of Apr 1, 2026 · source file | $5.00 | $20.00 | — | 75% |
| Uchicago Medicine AdventHealth La Grange lowest La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP+4 more lines at this price File of Apr 1, 2026 · source file | $5.00 | $20.00 | — | 75% |
| Saint Francis Hospital lowest Evanston, IL · (847) 316-4000 HC RHEUMATOID FACTOR, QUANT File of Sep 1, 2026 · source file | $5.00 | $175.00 | $3.40–$145.25 | 97% |
| Uchicago Medicine AdventHealth Bolingbrook lowest Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - LUPUS COMPREHENSIVE REFLEX PANEL - ARUP+4 more lines at this price File of Apr 1, 2026 · source file | $5.00 | $20.00 | — | 75% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $9.10 | $13.00 | $2.16–$13.00 | 30% |
| John H. Stroger, Jr. Hospital Chicago, IL · (312) 864-6000 RHEUMATOID FACTOR QN File of Apr 1, 2026 · source file | $10.50 | $15.00 | $1.59–$12.00 | 30% |
| Roseland Community Hospital Chicago, IL · (773) 995-3000 Rheumatoid factor level File of Jul 1, 2026 · source file | $11.72 | $7.00 | $3.50–$11.72 | -67% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $3.84–$24.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $4.56–$24.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $3.98–$24.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $4.39–$24.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $4.63–$24.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $1.66–$24.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $3.58–$24.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Lupus Panel 5, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $16.80 | $24.00 | $4.66–$24.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $17.50 | $25.00 | $4.83–$25.00 | 30% |
| Uchicago Medicine AdventHealth Glenoaks Glendale Heights, IL · (630) 545-8000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP File of Apr 1, 2026 · source file | $22.50 | $90.00 | — | 75% |
| Uchicago Medicine AdventHealth Hinsdale Hinsdale, IL · (630) 856-9000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP File of Apr 1, 2026 · source file | $22.50 | $90.00 | — | 75% |
| Uchicago Medicine AdventHealth La Grange La Grange, IL · (708) 352-1200 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP File of Apr 1, 2026 · source file | $22.50 | $90.00 | — | 75% |
| Uchicago Medicine AdventHealth Bolingbrook Bolingbrook, IL · (630) 312-5000 HC RHEUMATOID FACTOR - RHEUMATOID ARTHRITIS PANEL - ARUP File of Apr 1, 2026 · source file | $22.50 | $90.00 | — | 75% |
| Gottlieb Memorial Hospital Melrose Park, IL · (708) 681-3200 Rheumatoid Factor Qt File of Mar 31, 2026 · source file | $26.22 | $138.00 | $58.79–$115.64 | 81% |
| MacNeal Hospital Berwyn, IL · (708) 783-9100 Rheumatoid Factor Qt File of Mar 31, 2026 · source file | $26.22 | $138.00 | $26.22–$191.13 | 81% |
| Franciscan Health Munster Munster, IN · (219) 922-4200 Rheumatoid Factor Quant File of Jan 1, 2026 · source file | $26.63 | $125.00 | $4.48–$109.00 | 79% |
| Humboldt Park Health Chicago, IL · (773) 292-8200 Rheumatoid factor level File of Sep 29, 2026 · source file | $26.75 | $95.55 | $31.53–$100.33 | 72% |
| Loyola University Medical Center Maywood, IL · (708) 216-9000 Rheumatoid Factor Qt File of Mar 31, 2026 · source file | $31.74 | $138.00 | $69.00–$145.45 | 77% |
| La Rabida Children's Hospital Chicago, IL · (773) 363-6700 RHEUMATOID FACTOR File of Apr 1, 2026 · source file | $37.01 | $37.01 | — | — |
| Advocate Sherman Hospital Elgin, IL · (847) 742-9800 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$67.50 | 50% |
| Advocate Condell Medical Center Libertyville, IL · (847) 362-2900 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Advocate Trinity Hospital Chicago, IL · (773) 967-5002 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Advocate Childrens Hospital Oak Lawn Oak Lawn, IL RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Advocate Good Samaritan Hospital Downers Grove, IL · (630) 275-5900 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Advocate South Suburban Hospital Hazel Crest, IL RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$73.05 | 50% |
| Advocate Lutheran General Hospital Park Ridge, IL · (847) 723-2210 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$66.75 | 50% |
| Advocate Good Shepherd Hospital Barrington, IL · (847) 381-9600 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Advocate Illinois Masonic Medical Center Chicago, IL · (773) 975-1600 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$61.05 | 50% |
| Advocate Childrens Hospital Park Ridge Park Ridge, IL RHEUMATOID FACTOR QUANTITATIVE File of Nov 6, 2026 · source file | $37.50 | $75.00 | $5.04–$66.75 | 50% |
| Advocate Christ Medical Center Oak Lawn, IL · (708) 684-8000 RHEUMATOID FACTOR QUANTITATIVE File of Nov 3, 2026 · source file | $37.50 | $75.00 | $5.04–$60.00 | 50% |
| Community First Medical Center Chicago, IL · (773) 282-7000 Rheumatoid factor level File of Apr 1, 2026 · source file | $41.88 | $83.75 | $4.75–$83.75 | 50% |
| Morris Hospital Morris, IL · (815) 942-2932 Rheumatoid factor level File of Oct 27, 2026 · source file | $44.51 | $185.00 | $79.92–$190.55 | 76% |
| Franciscan Health Crown Point Crown Point, IN · (219) 757-6100 Rheumatoid Factor Quant File of Jan 1, 2026 · source file | $46.44 | $180.00 | $180.00 | 74% |
| Franciscan Health Dyer Dyer, IN · (219) 865-2141 Rheumatoid Factor Quant File of Jan 1, 2026 · source file | $52.11 | $193.00 | $5.07–$144.75 | 73% |
| Shriners Childrens - Chicago Chicago, IL · (773) 622-5400 RHEUMATOID FACTOR LEVEL File of Mar 19, 2026 · source file | $53.50 | $53.50 | $5.04–$10.71 | — |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Anachoice Panel 1, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $53.90 | $77.00 | $12.32–$77.00 | 30% |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Quantitative-Laf File of Apr 1, 2026 · source file | $54.00 | $54.00 | — | — |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Avise Rheumatoid Factor Quant Igm (Exa)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $15.01–$82.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $15.83–$82.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Avise Rheumatoid Factor Quant Igm (Exa)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $13.61–$82.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Avise Rheumatoid Factor Quant Igm (Exa)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $5.66–$82.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $15.58–$82.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Avise Rheumatoid Factor Quant Igm (Exa)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $13.12–$82.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $12.22–$82.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Ana 12 Profile, Rheumatoid Factor Quant (Lc)+2 more lines at this price File of Apr 1, 2026 · source file | $57.40 | $82.00 | $15.91–$82.00 | 30% |
| Presence Saint Joseph Hospital - Chicago Chicago, IL · (773) 665-3000 HC RHEUMATOID FACTOR - RA TEST+1 more line at this price File of Jan 1, 2026 · source file | $57.75 | $175.00 | $5.67–$23.16 | 67% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Factor (Q)+2 more lines at this price File of Apr 1, 2026 · source file | $59.50 | $85.00 | $5.87–$85.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $59.50 | $85.00 | $13.60–$85.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $59.50 | $85.00 | $16.41–$85.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $59.50 | $85.00 | $16.15–$85.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Rheumatoid Factor (Q)+2 more lines at this price File of Apr 1, 2026 · source file | $59.50 | $85.00 | $3.04–$88.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Factor (Q)+2 more lines at this price File of Apr 1, 2026 · source file | $59.50 | $85.00 | $12.67–$85.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $59.50 | $85.00 | $14.11–$85.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Interstitial Lung Disease Panel, Rheumatoid Factor Quant (Q) File of Apr 1, 2026 · source file | $59.50 | $85.00 | $15.56–$85.00 | 30% |
| Franciscan Health Rensselaer Rensselaer, IN · (219) 866-5141 Rheumatoid Factor Quant File of Jan 1, 2026 · source file | $59.79 | $167.00 | $5.07–$133.60 | 64% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $16.68–$86.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $13.76–$86.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $15.74–$86.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $12.81–$86.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $5.93–$86.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $14.28–$86.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $16.34–$86.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Arthritis (Ra) Profile, Rheumatoid Factor (Lc) File of Apr 1, 2026 · source file | $60.20 | $86.00 | $16.60–$86.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $61.60 | $88.00 | $16.98–$88.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $6.21–$90.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $13.41–$90.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Vasculitis Profile (Rdl), Rheumatoid Factor (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $17.46–$90.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $17.10–$90.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $17.37–$90.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Interstitial Lung Disease Autoantibody Panel, Rheumatoid Factor Quant (Arup)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $14.94–$90.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $16.47–$90.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumassure, Rheumatoid Factor Quant (Lc)+3 more lines at this price File of Apr 1, 2026 · source file | $63.00 | $90.00 | $14.40–$90.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $66.50 | $95.00 | $15.20–$95.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $67.90 | $97.00 | $5.24–$152.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $67.90 | $97.00 | $6.69–$97.00 | 30% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $67.90 | $97.00 | $17.75–$97.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $69.30 | $99.00 | $15.84–$99.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $69.30 | $99.00 | $19.11–$99.00 | 30% |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $69.30 | $99.00 | $16.43–$99.00 | 30% |
| Louis A Weiss Memorial Hospital Chicago, IL · (773) 878-8700 Rheumatoid Arthritis Factor SO+1 more line at this price File of Mar 17, 2025 · source file | $69.67 | $204.92 | $4.55–$133.20 | 66% |
| Northwestern Medicine Kishwaukee Hospital DeKalb, IL · (815) 756-1521 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $76.30 | $109.00 | $19.95–$109.00 | 30% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $76.30 | $109.00 | $16.24–$109.00 | 30% |
| Northwestern Medicine Valley West Hospital Sandwich, IL · (815) 786-8484 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $77.00 | $110.00 | $20.90–$110.00 | 30% |
| Resilience Healthcare West Suburban Medical Center Oak Park, IL · (708) 383-6200 Rheumatoid Arthritis Factor SO+1 more line at this price File of Mar 17, 2025 · source file | $79.33 | $233.33 | $4.55–$151.66 | 66% |
| NorthShore University HealthSystems Glenbrook Hospital Glenview, IL Rheumatoid Factor Quant* File of Jan 1, 2025 · source file | $84.50 | $130.00 | $17.55–$70.98 | 35% |
| NorthShore University HealthSystems Skokie Hospital Skokie, IL Rheumatoid Factor Quant* File of Jan 1, 2025 · source file | $84.50 | $130.00 | $17.55–$70.98 | 35% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $85.40 | $122.00 | $18.18–$122.00 | 30% |
| Palos Community Hospital Palos Heights, IL · (708) 923-4000 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $98.00 | $140.00 | $22.40–$140.00 | 30% |
| Mercyhealth Crystal Lake Hospital & Medical Center Crystal Lake, IL · (792) 220-5500 CHG RHEUMATOID FACTOR QUANTITATIVE File of Mar 1, 2026 · source file | $105.26 | $140.35 | — | 25% |
| Northwestern Medicine Delnor Hospital Geneva, IL · (630) 208-3000 HB Ref Sensorimotor Neuro Profile, Rheumatoid Factor (Q) File of Apr 1, 2026 · source file | $106.40 | $152.00 | $22.65–$152.00 | 30% |
| Elmhurst Memorial Hospital Elmhurst, IL · (331) 221-1000 HC RHEUMATOID FACTOR QUANTITATIVE File of Apr 1, 2026 · source file | $112.00 | $112.00 | — | — |
| Edward Hospital Naperville, IL · (630) 527-3000 HC RHEUMATOID FACTOR QUANTITATIVE File of Apr 1, 2026 · source file | $112.00 | $112.00 | — | — |
| Northwest Health - Porter Valparaiso, IN · (219) 983-8300 Rheumatoid Factor Titer File of Apr 1, 2026 · source file | $118.53 | $439.00 | $5.00–$368.76 | 73% |
| Northwest Community Hospital Arlington Heights, IL · (847) 618-1000 Hb Rheumatoid Factor Quant File of Apr 1, 2026 · source file | $123.00 | $123.00 | — | — |
| Mercyhealth Hospital & Medical Center - Harvard Harvard, IL · (815) 943-5431 CHG RHEUMATOID FACTOR QUANTITATIVE File of Mar 1, 2026 · source file | $123.76 | $165.02 | — | 25% |
| Northshore University Healthsystem - Evanston Hospital Evanston, IL · (847) 570-2000 HB RHEUMATOID FACTOR, QUANT* File of Apr 1, 2026 · source file | $130.00 | $130.00 | — | — |
| Swedish Covenant Health Chicago, IL · (773) 878-8200 HB RHEUMATOID FACTOR, QUANT* File of Apr 1, 2026 · source file | $130.00 | $130.00 | — | — |
| Endeavor Health Highland Park Hospital Highland Park, IL HB RHEUMATOID FACTOR, QUANT* File of Apr 1, 2026 · source file | $130.00 | $130.00 | — | — |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $144.20 | $206.00 | $14.21–$206.00 | 30% |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $144.20 | $206.00 | $13.19–$257.00 | 30% |
| Ann & Robert H. Lurie Children's Hospital of Chicago Chicago, IL · (312) 227-4000 RHEUMATOID FACTOR QUANT SERUM File of Sep 1, 2026 · source file | $147.00 | $210.00 | $35.70–$199.50 | 30% |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Igm+2 more lines at this price File of Apr 1, 2026 · source file | $159.00 | $159.00 | — | — |
| Northwestern Memorial Hospital Chicago, IL · (312) 926-2000 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $160.30 | $229.00 | $19.21–$229.00 | 30% |
| Northwestern Medicine Central DuPage Hospital Winfield, IL · (630) 682-1600 HB Ref Rheumatoid Factor (Rf), Quantitative (Q) File of Apr 1, 2026 · source file | $160.30 | $229.00 | $15.80–$229.00 | 30% |
| Ingalls Memorial Hospital Harvey, IL · (708) 333-2300 Hc Rheumatoid Factor; Quantitative+3 more lines at this price File of Apr 1, 2026 · source file | $163.00 | $163.00 | — | — |
| Northwestern Lake Forest Hospital Lake Forest, IL · (847) 234-5600 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $179.90 | $257.00 | $42.66–$257.00 | 30% |
| Northwestern Medicine McHenry Hospital McHenry, IL · (815) 344-5000 HB Rheumatoid Factor (Rf), Quantitative File of Apr 1, 2026 · source file | $179.90 | $257.00 | $49.60–$257.00 | 30% |
| Vista Medical Center East Waukegan, IL · (847) 360-3000 RHEUMATOID FACT QUAN File of Mar 31, 2025 · source file | $184.99 | $184.99 | $5.67–$26.08 | — |
| Methodist Hospital-Southlake Merrillville, IN · (219) 886-4000 Rf Titer File of Aug 18, 2026 · source file | $191.80 | $274.00 | $5.67–$243.86 | 30% |
| The Methodist Hospitals Gary, IN · (219) 886-4000 Rf Titer File of Aug 18, 2026 · source file | $191.80 | $274.00 | $5.67–$243.86 | 30% |
| The University of Chicago Medical Center Chicago, IL · (773) 702-9785 Hc Rheumatoid Factor; Quantitative File of Apr 1, 2026 · source file | $288.00 | $288.00 | — | — |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
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 38 facilities here, median $49.28. 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 39 of 45 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 5 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 rheumatoid factor test is, what the price covers and why prices differ: Rheumatoid factor test explained.
2 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 86431 ($28.80). 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.
| Hospital | Cash price | File |
|---|---|---|
| Loyola University Medical Center Maywood, ILEwc - Lab Raf (Rheumatoid Factor) | $0.01 | file |
| Gottlieb Memorial Hospital Melrose Park, ILEwc - Lab Raf (Rheumatoid Factor) | $0.01 | file |
File Link to the hospital's own price file.