Lab tests CPT 86431 Outpatient

Rheumatoid factor test cost in Appleton, WI

In Appleton, WI, 4 hospitals list a cash price for rheumatoid factor (RF) test: from $23.13 to $34.20, with a median of $23.25. The lowest listed price is at ThedaCare Regional Medical Center-Appleton and 1 other hospital — $0.12 less than the median here. Across Wisconsin, the median is $57.50 at 81 hospitals.

Cash prices at 4 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 — and —.

Lowest$23.13ThedaCare Regional Medical Center-Appleton + 1 more
Median$23.25half pay less
Highest$34.20in this market
Difference1.5×highest vs lowest

Where each hospital's price falls

Each dot is one hospital's cash price on a scale from the lowest to the highest in Appleton, WI.

median
Lowest $23.13Highest $34.20

Hospitals, cheapest first

HospitalCash price List priceInsurers payOff listFile date
ThedaCare Regional Medical Center-Appleton lowest Appleton, WI RA TITER $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI RHEUMATOID FACTOR,SERUM $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI RHEUMATOID FACTOR, BLOOD $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI RHEUMATOID FACTOR; QUANTITATIVE $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI · (920) 731-4101 RHEUMATOID FACTOR, BLOOD $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI · (920) 731-4101 RHEUMATOID FACTOR; QUANTITATIVE $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI · (920) 731-4101 RA TITER $23.13 $41.30 — 44% —
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ThedaCare Regional Medical Center-Appleton lowest Appleton, WI · (920) 731-4101 RHEUMATOID FACTOR,SERUM $23.13 $41.30 — 44% —
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Ascension NE Wisconsin - St Elizabeth Campus Appleton, WI · (920) 738-2000 HC RHEUMATOID FACTOR QUANTITATIVE $23.37 $41.00 $5.95–$12.75 43% —
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Ascension Calumet Hospital Chilton, WI · (920) 849-2386 HC RHEUMATOID FACTOR QUANTITATIVE $34.20 $60.00 $5.95–$12.75 43% —
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Outpatient: lowest $23.13, median $23.25, highest $34.20 — a 1.5× difference within the same market.

Cash or insurance?

At 0 of 2 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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.