Rheumatoid factor test cost in Madison, WI
In Madison, WI, 2 hospitals list a cash price for rheumatoid factor (RF) test: from $58.50 to $79.20, with a median of $68.85. The lowest listed price is at Aspirus Divine Savior Hospital — $10.35 less than the median here. Across Wisconsin, the median is $57.50 at 81 hospitals.
Cash prices at 2 facilities across 2 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 Jan 28, 2026 and Apr 1, 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 Madison, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Aspirus Divine Savior Hospital lowest Portage, WI · (608) 742-4131 RHEUMATOID FACTOR QUANTITATIVE | $58.50 | $90.00 | — | 35% | Apr 1, 2026 source file |
| Aspirus Divine Savior Hospital lowest Portage, WI · (608) 742-4131 Fac Rheumatoid Factor, Quant | $58.50 | $90.00 | — | 35% | Apr 1, 2026 source file |
| UnityPoint Health - Meriter Madison, WI · (608) 417-6210 CHG RHEUMATOID FACTOR, QUANT | $79.20 | $99.00 | $3.40–$94.05 | 20% | Jan 28, 2026 source file |
| UnityPoint Health - Meriter Madison, WI · (608) 417-6210 HC QUAN RHEUM FACTOR | $82.60 | $103.24 | $5.67–$98.08 | 20% | Jan 28, 2026 source file |
Outpatient: lowest $58.50, median $68.85, highest $79.20 — a 1.4× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $68.85. 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.