Rheumatoid factor test cost in Decatur, IL
In Decatur, IL, 1 hospital lists a cash price for rheumatoid factor (RF) test: from $105.84 to $105.84, with a median of $105.84. Across Illinois, the median is $37.50 at 65 hospitals.
Cash prices at 1 facility 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 — and —.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| St Marys Hospital Decatur of Hospital Sisters of the Third Order of St Francis Decatur, IL · (217) 464-2966 HC RHEUMATOID FACTOR QN | $105.84 | $147.00 | $5.67–$147.00 | 28% | — source file |
Outpatient: lowest $105.84, median $105.84, highest $105.84.
As an inpatient, the same code is billed by 1 facility here, median $105.84. 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 the one hospital here that publishes insurer rates for this code, the cash price is 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.