Lab tests CPT 86431 Inpatient — admitted to hospital

Rheumatoid factor test cost in Plymouth, IN — inpatient

In Plymouth, IN, 2 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $51.35 to $59.15, with a median of $55.25. The lowest listed price is at Community Hospital of Bremen — $3.90 less than the median here. Across Indiana, the median is $33.60 at 62 hospitals.

Cash prices at 2 facilities across 2 cities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Mar 31, 2026.

Lowest$51.35Community Hospital of Bremen
Median$55.25half pay less
Highest$59.15in this market
Difference1.2×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 Plymouth, IN.

median
Lowest $51.35Highest $59.15

Hospitals, cheapest first

HospitalCash price List priceInsurers payOff listFile date
Community Hospital of Bremen lowest Bremen, IN · (574) 546-2211 Rheumatoid Factor Blood $51.35 $79.00 $39.50–$102.70 35% Jan 1, 2026
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Community Hospital of Bremen lowest Bremen, IN · (574) 546-2211 86431 RHEUMATOID FACTOR QUANT $51.35 $79.00 $39.50–$102.70 35% Jan 1, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 164065 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 504509 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 56499 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 504589 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 520298 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 520178 Rheumatoid Factor Isotype Igm Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 24141 Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 520178 Rheumatoid Factor Isotype Iga Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp Rheumatoid Factor Quantitative Body Fluid $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Labcorp 520178 Rheumatoid Factor Isotype Igg Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Plymouth Medical Center Plymouth, IN · (574) 948-4000 HC Rheumatoid Factor Quantitative $59.15 $91.00 $3.16–$91.00 35% Mar 31, 2026
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Inpatient: lowest $51.35, median $55.25, highest $59.15 — a 1.2× difference within the same market.

As an outpatient, the same code is billed by 2 facilities here, median $55.25 — that is the price to compare if you are not being admitted.

Cash or insurance?

At 2 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.