Rheumatoid factor test cost in Los Angeles, CA
In Los Angeles-Long Beach-Anaheim, CA, 28 hospitals list a cash price for rheumatoid factor (RF) test: from $5.00 to $76.25, with a median of $13.00. The lowest listed price is at Sherman Oaks Hospital and 3 other hospitals — $8.00 less than the median here. Across California, the median is $13.20 at 93 hospitals.
Cash prices at 28 facilities across 24 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 Nov 26, 2025 and Sep 1, 2026.
Lowest$5.00Sherman Oaks Hospital + 3 more
Median$13.00half pay less
Highest$76.25in this market
Difference15.2×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 Los Angeles-Long Beach-Anaheim, CA.
median
Lowest $5.00Highest $187.60
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Sherman Oaks Hospital lowest Sherman Oaks, CA · (818) 981-7111 RA TEST | $5.00 | $43.00 | $1.00–$62.89 | 88% | Sep 1, 2026 source file |
| Sherman Oaks Hospital lowest Sherman Oaks, CA · (818) 981-7111 RF ISOTYPES IGG IGA IGM EIA LC | $5.00 | $62.89 | $1.00–$62.89 | 92% | Sep 1, 2026 source file |
| Sherman Oaks Hospital lowest Sherman Oaks, CA · (818) 981-7111 RHEUMATOID FACTOR LVLS IGA LC | $5.00 | $8.82 | $1.00–$62.89 | 43% | Sep 1, 2026 source file |
| Sherman Oaks Hospital lowest Sherman Oaks, CA · (818) 981-7111 RHEUMATOID FACTOR (RF) LC | $5.00 | $3.00 | $1.00–$62.89 | -67% | Sep 1, 2026 source file |
| La Palma Intercommunity Hospital lowest La Palma, CA · (714) 670-7400 Hc Rheumatoid Factor, Quant | $5.00 | $70.88 | $5.67–$70.88 | 93% | Sep 1, 2026 source file |
| Encino Hospital Medical Center lowest Encino, CA · (818) 995-5000 RA FACTOR QUANT | $5.00 | $255.20 | $1.00–$255.20 | 98% | Sep 1, 2026 source file |
| Encino Hospital Medical Center lowest Encino, CA · (818) 995-5000 RF ISOTYPES IGG IGA IGM EIA LC | $5.00 | $62.89 | $1.00–$255.20 | 92% | Sep 1, 2026 source file |
| Encino Hospital Medical Center lowest Encino, CA · (818) 995-5000 Rhumatoid Arthrits(RA)FactorLC | $5.00 | $3.00 | $1.00–$255.20 | -67% | Sep 1, 2026 source file |
| Centinela Hospital Medical Center lowest Inglewood, CA · (310) 673-4660 PN RA,RHEUM FAC QN LC1 | $5.00 | $60.15 | $2.48–$254.00 | 92% | Sep 1, 2026 source file |
| Centinela Hospital Medical Center lowest Inglewood, CA · (310) 673-4660 RHEUMATOID ARTHRITIS FACTOR LC | $5.00 | $11.34 | $2.48–$254.00 | 56% | Sep 1, 2026 source file |
| Centinela Hospital Medical Center lowest Inglewood, CA · (310) 673-4660 RHEUMATOID FACTOR QUANT | $5.00 | $254.00 | $2.48–$254.00 | 98% | Sep 1, 2026 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 RHEUMATOID FACTOR; QUANTITATIVE | $7.90 | $12.15 | $14.14–$77.72 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 Laboratory Services | $7.90 | $12.15 | $14.14–$77.72 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 HB MISC LAB SPECIAL TEST | $7.90 | $12.15 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Medical Center Los Angeles, CA · (310) 423-5000 HB LAB ANTIB RA QUANT | $7.90 | $12.15 | — | 35% | Nov 26, 2025 source file |
| Mission Hospital Regional Med Center Mission Viejo, CA · (949) 364-1400 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $8.16 | $17.00 | — | 52% | Apr 1, 2026 source file |
| St Joseph Hospital of Orange Orange, CA · (714) 633-9111 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $8.16 | $17.00 | — | 52% | Apr 1, 2026 source file |
| St Jude Hospital Fullerton, CA · (714) 992-3000 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $8.16 | $17.00 | — | 52% | Apr 1, 2026 source file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CA · (949) 764-4624 HC Rheumatoid Factor Quant - Ana W/Reflex to Titer | $9.20 | $14.16 | — | 35% | Apr 1, 2026 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 HB LAB ANLZR - RHEUM FAC, QUANT | $10.74 | $16.53 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Clinical and Anatomical Laboratory Services | $10.74 | $16.53 | $14.16–$43.94 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Laboratory Services | $10.74 | $16.53 | $14.16–$43.94 | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 HB MISC LAB SPECIAL TEST | $10.74 | $16.53 | — | 35% | Nov 26, 2025 source file |
| Cedars-Sinai Marina Hospital Marina del Rey, CA · (310) 823-8911 Outpatient Global Laboratory, Radiology and Diagnostic Services | $10.74 | $16.53 | $14.16–$43.94 | 35% | Nov 26, 2025 source file |
| Kaiser Foundation Hospital - Downey Downey, CA · (562) 461-6007 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Los Angeles Los Angeles, CA · (323) 783-4011 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - West la Los Angeles, CA · (213) 857-2201 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Baldwin Park Baldwin Park, CA · (626) 851-1011 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - South Bay Harbor City, CA · (310) 325-5111 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Anaheim Anaheim, CA · (714) 279-4000 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Panorama City Panorama City, CA · (818) 375-2000 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Orange County - Irvine Irvine, CA RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Kaiser Foundation Hospital - Woodland Hills Woodland Hills, CA · (818) 719-3800 RHEUMATOID FACTOR QUANTITATIVE | $13.00 | $25.00 | $3.00–$10.00 | 48% | — source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $15.40 | $44.00 | — | 65% | Apr 1, 2026 source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC RHEUMATOID FACTOR QUANT | $15.40 | $44.00 | — | 65% | Apr 1, 2026 source file |
| St Jude Hospital Fullerton, CA · (714) 992-3000 HC RHEUMATOID FACTOR QUANT | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| Mission Hospital Regional Med Center Mission Viejo, CA · (949) 364-1400 HC RHEUMATOID FACTOR QUANT | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| St Joseph Hospital of Orange Orange, CA · (714) 633-9111 HC RHEUMATOID FACTOR QUANT | $16.80 | $35.00 | — | 52% | Apr 1, 2026 source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $20.30 | $58.00 | — | 65% | Apr 1, 2026 source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC RHEUMATOID FACTOR QUANT | $20.30 | $58.00 | — | 65% | Apr 1, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $21.70 | $62.00 | — | 65% | Apr 1, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC RHEUMATOID FACTOR QUANT | $21.70 | $62.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANT | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANT - RA TITER | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANT - RA TITER | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANT | $36.75 | $105.00 | — | 65% | Apr 1, 2026 source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC RHEUMATOID FACTOR QUANT | $42.35 | $121.00 | — | 65% | Apr 1, 2026 source file |
| Providence Holy Cross Medical Center Mission Hills, CA · (818) 365-8051 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $42.35 | $121.00 | — | 65% | Apr 1, 2026 source file |
| USC Arcadia Hospital Arcadia, CA · (626) 898-8000 RF (RHEUMATOID FACTOR) QT | $52.85 | $151.00 | $5.44–$151.00 | 65% | Jul 27, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC RHEUMATOID FACTOR QUANT | $53.90 | $154.00 | — | 65% | Apr 1, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $53.90 | $154.00 | — | 65% | Apr 1, 2026 source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC RHEUMATOID FACTOR QUANT | $60.55 | $173.00 | — | 65% | Apr 1, 2026 source file |
| Providence Saint Joseph Medical Center Burbank, CA · (818) 843-5111 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $60.55 | $173.00 | — | 65% | Apr 1, 2026 source file |
| Keck Hospital of USC Los Angeles, CA · (323) 442-8656 Rheumatoid Factor Quant | $62.50 | $62.50 | — | — | Apr 1, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $64.75 | $185.00 | — | 65% | Apr 1, 2026 source file |
| Providence Cedars Sinai Tarzana Medical Center Tarzana, CA · (818) 881-0800 HC RHEUMATOID FACTOR QUANT | $64.75 | $185.00 | — | 65% | Apr 1, 2026 source file |
| USC Kenneth Norris Jr Cancer Hospital Los Angeles, CA Rheumatoid Factor Quant | $76.25 | $76.25 | — | — | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANT | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANT - RA TITER | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Company of Mary Medical Center Torrance Torrance, CA · (310) 540-7676 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANT - RA TITER | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANT | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Providence Little Co of Mary Medical Center San Pedro San Pedro, CA · (310) 832-3311 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $83.65 | $239.00 | — | 65% | Apr 1, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC RHEUMATOID FACTOR QUANT | $187.60 | $536.00 | — | 65% | Apr 1, 2026 source file |
| Saint John's Health Center Santa Monica, CA · (310) 829-5511 HC RHEUMATOID FACTOR QUANTITATIVE LAB | $187.60 | $536.00 | — | 65% | Apr 1, 2026 source file |
Outpatient: lowest $5.00, median $13.00, highest $76.25 — a 15.2× difference within the same market.
As an inpatient, the same code is billed by 25 facilities here, median $13.00. 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 6 of 15 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 2 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.
6 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.
| UCI Health - Los Alamitos Orange, CARHEUMATOID FACTOR QUANT | $0.82 | file |
| UCI Health - Lakewood Orange, CARHEUMATOID FACTOR QUANT | $1.20 | file |
| UCI Health - Placentia Linda Orange, CARHEUMATOID FACTOR QUANT | $1.20 | file |
| UCI Health - Fountain Valley Orange, CARHEUMATOID FACTOR QUANT | $1.20 | file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CAHC Rheumatoid Factor Quant | $1.56 | file |
| Hoag Memorial Hospital Presbyterian Newport Beach, CAHC Rheumatoid Factor Quant - Lupus Panel 4 | $2.12 | file |