Rheumatoid factor test cost in Porola, CA — inpatient
In Porola, CA, 1 hospital lists a cash price for rheumatoid factor (RF) test as an inpatient: from $35.20 to $35.20, with a median of $35.20. Across California, the median is $13.00 at 141 hospitals.
Cash prices at 1 facility for code 86431, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between — and —.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Eastern Plumas Health Care Porola, CA · (530) 832-6500 RA Latex Turbid LC | $35.20 | $44.00 | $25.44–$29.32 | 20% | — source file |
Inpatient: lowest $35.20, median $35.20, highest $35.20.
As an outpatient, the same code is billed by 1 facility here, median $35.20 — that is the price to compare if you are not being admitted.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is not below the highest rate a health plan has negotiated. 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.