Rheumatoid factor test cost in Urban Honolulu, HI — inpatient
In Urban Honolulu, HI, 3 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $18.60 to $18.60, with a median of $18.60. The lowest listed price is at Kapiolani Medical Center for Women & Children and 2 other hospitals. Across Hawaii, the median is $18.60 at 5 hospitals.
Cash prices at 3 facilities across 2 cities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 22, 2026; the hospital files themselves were last updated between Feb 12, 2026 and Feb 12, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Urban Honolulu, HI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Kapiolani Medical Center for Women & Children lowest Honolulu, HI · (808) 983-6000 RHEUMATOID FACTOR, QUANT | $18.60 | $31.00 | $23.25–$27.90 | 40% | Feb 12, 2026 source file |
| Pali Momi Medical Center lowest Aiea, HI · (808) 486-6000 RHEUMATOID FACTOR, QUANT | $18.60 | $31.00 | $23.25–$26.35 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital lowest Honolulu, HI · (808) 522-4000 RHEUMATOID FACTOR, QUANT | $18.60 | $31.00 | $23.25–$26.35 | 40% | Feb 12, 2026 source file |
| Kapiolani Medical Center for Women & Children Honolulu, HI · (808) 983-6000 RHEUMATOID FACTOR-QUANTITATIVE | $28.80 | $48.00 | $36.00–$43.20 | 40% | Feb 12, 2026 source file |
| Kapiolani Medical Center for Women & Children Honolulu, HI · (808) 983-6000 ANA /RF W/REFLEX | $28.80 | $48.00 | $36.00–$43.20 | 40% | Feb 12, 2026 source file |
| Pali Momi Medical Center Aiea, HI · (808) 486-6000 RHEUMATOID FACTOR-QUANTITATIVE | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital Honolulu, HI · (808) 522-4000 RHEUMATOID FACTOR-QUANTITATIVE | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital Honolulu, HI · (808) 522-4000 ANA /RF W/REFLEX | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
| Straub Clinic & Hospital Honolulu, HI · (808) 522-4000 ANTINUCLEAR AB & RHEUMATOID FACTOR W/RFLX | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
| Kapiolani Medical Center for Women & Children Honolulu, HI · (808) 983-6000 ANTINUCLEAR AB & RHEUMATOID FACTOR W/RFLX | $28.80 | $48.00 | $36.00–$43.20 | 40% | Feb 12, 2026 source file |
| Pali Momi Medical Center Aiea, HI · (808) 486-6000 ANA /RF W/REFLEX | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
| Pali Momi Medical Center Aiea, HI · (808) 486-6000 ANTINUCLEAR AB & RHEUMATOID FACTOR W/RFLX | $28.80 | $48.00 | $36.00–$40.80 | 40% | Feb 12, 2026 source file |
Inpatient: lowest $18.60, median $18.60, highest $18.60.
As an outpatient, the same code is billed by 4 facilities here, median $18.60 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 3 of 3 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.