Lab tests CPT 86431 Inpatient — admitted to hospital

Rheumatoid factor test cost in Charleston, SC — inpatient

In Charleston-North Charleston, SC, 5 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $13.65 to $80.00, with a median of $13.65. The lowest listed price is at Roper Hospital and 3 other hospitals. Across South Carolina, the median is $80.00 at 19 hospitals.

Cash prices at 5 facilities across 3 cities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 2026.

Lowest$13.65Roper Hospital + 3 more
Median$13.65half pay less
Highest$80.00in this market
Difference5.9×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 Charleston-North Charleston, SC.

median
Lowest $13.65Highest $225.55

Hospitals, cheapest first

HospitalCash price List priceInsurers payOff listFile date
Roper Hospital lowest Charleston, SC · (843) 724-2800 HC So Ra Titer, Quantitative $13.65 $21.00 — 35% —
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Roper St Francis Mount Pleasant Hospital lowest Mount Pleasant, SC HC So Ra Titer, Quantitative $13.65 $21.00 — 35% —
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Bon Secours St Francis Xavier Hospital lowest Charleston, SC · (843) 402-1006 HC So Ra Titer, Quantitative $13.65 $21.00 — 35% —
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Roper St Francis Hospital Berkeley lowest Summerville, SC · (854) 529-3002 HC So Ra Titer, Quantitative $13.65 $21.00 — 35% —
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MUSC Medical Center Charleston, SC · (843) 792-2300 HB RHEUMATOID FACTOR QN $80.00 $160.00 — 50% Apr 1, 2026
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Bon Secours St Francis Xavier Hospital Charleston, SC · (843) 402-1006 HC Rheumatoid Factor Quantitative $225.55 $347.00 — 35% —
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Roper Hospital Charleston, SC · (843) 724-2800 HC Rheumatoid Factor Quantitative $225.55 $347.00 — 35% —
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Roper St Francis Mount Pleasant Hospital Mount Pleasant, SC HC Rheumatoid Factor Quantitative $225.55 $347.00 — 35% —
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Roper St Francis Hospital Berkeley Summerville, SC · (854) 529-3002 HC Rheumatoid Factor Quantitative $225.55 $347.00 — 35% —
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Inpatient: lowest $13.65, median $13.65, highest $80.00 — a 5.9× difference within the same market.

As an outpatient, the same code is billed by 5 facilities here, median $13.65 — that is the price to compare if you are not being admitted.

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.