Rheumatoid factor test cost in Milwaukee, WI — inpatient
In Milwaukee-Waukesha, WI, 14 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $48.23 to $87.98, with a median of $57.50. The lowest listed price is at Columbia St. Mary's Hospital Ozaukee and 2 other hospitals — $9.27 less than the median here. Across Wisconsin, the median is $57.50 at 81 hospitals.
Cash prices at 14 facilities across 10 cities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Nov 21, 2025 and Mar 23, 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 Milwaukee-Waukesha, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Columbia St. Mary's Hospital Ozaukee lowest Mequon, WI HC RHEUMATOID FACTOR QUANTITATIVE | $48.23 | $91.00 | $5.95–$25.90 | 47% | — source file |
| Columbia St. Mary's Hospital Milwaukee lowest Milwaukee, WI · (414) 585-1374 HC RHEUMATOID FACTOR QUANTITATIVE | $48.23 | $91.00 | $5.95–$25.90 | 47% | — source file |
| Sacred Heart Rehabilitation Institute lowest Mequon, WI HC RHEUMATOID FACTOR QUANTITATIVE | $48.23 | $91.00 | $5.95–$25.90 | 47% | — source file |
| Aurora Medical Center Kenosha Kenosha, WI · (262) 948-5600 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora Psychiatric Hospital Wauwatosa, WI · (414) 454-6600 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora Sinai Medical Center of Aurora Health Care Metro Milwaukee, WI RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes Medical Center of Aurora Health Care Metro Milwaukee, WI · (414) 649-6000 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora St Lukes South Shore of Aurora Health Care Metro Cudahy, WI RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora West Allis Medical Center West Allis, WI · (414) 328-6000 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Grafton Grafton, WI · (262) 329-1000 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Washington County Hartford, WI · (262) 673-2300 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Aurora Medical Center Summit Summit, WI · (262) 434-1600 RHEUMATOID FACTOR QUANTITATIVE | $57.50 | $115.00 | $69.00–$97.75 | 50% | Nov 21, 2025 source file |
| Children's Hospital of Wisconsin Milwaukee, WI · (414) 266-3954 HBC RHEUMATOID FACTOR | $63.11 | $114.75 | $80.33–$109.01 | 45% | Mar 23, 2026 source file |
| Children's Hospital of Wisconsin Milwaukee, WI · (414) 266-3954 HBC RHEUMATOID FACTOR | $63.11 | $114.75 | $80.33–$109.01 | 45% | Mar 23, 2026 source file |
| Columbia St. Mary's Glendale, WI RA TITER QUANT | $87.98 | $166.00 | $5.50–$13.83 | 47% | — source file |
Inpatient: lowest $48.23, median $57.50, highest $87.98 — a 1.8× difference within the same market.
As an outpatient, the same code is billed by 18 facilities here, median $57.50 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 10 of 14 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 10 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.