Lab tests CPT 86431 Inpatient — admitted to hospital

Rheumatoid factor test cost in Ames, IA — inpatient

In Ames, IA, 1 hospital lists a cash price for rheumatoid factor (RF) test as an inpatient: from $9.60 to $9.60, with a median of $9.60. Across Iowa, the median is $48.57 at 70 hospitals.

Cash prices at 1 facility for code 86431, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between — and —.

Lowest$9.60Story County Hospital
Median$9.60half pay less
Highest$9.60in this market
Difference1.0×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 Ames, IA.

median
Lowest $9.60Highest $1,681.60

Hospitals, cheapest first

HospitalCash price List priceInsurers payOff listFile date
Story County Hospital lowest Nevada, IA · (515) 382-2111 RHEUMATOID FACTOR QC/V/Z/Y/A/D/E/F/G/I/J/L/M/N/O/P/S/W/X/C1/S1/L1/P1/PL/G1/F1/M2 $9.60 $12.00 $8.00–$12.00 20% —
source file
Story County Hospital Nevada, IA · (515) 382-2111 CHG RHEUMATOID FACTOR, QUANT $10.40 $13.00 $8.00–$13.00 20% —
source file
Story County Hospital Nevada, IA · (515) 382-2111 FLUID RHEUMATOID FCT L/M/W/L1/PL/O/J/C1/R/P/E/G1/M2 $11.20 $14.00 $9.00–$14.00 20% —
source file
Story County Hospital Nevada, IA · (515) 382-2111 RA TITER M9060 M/L/W//S1/F/G/PMP/A/X/N/QC/Q/W1 $1,681.60 $2,102.00 $1,450.00–$2,102.00 20% —
source file

Inpatient: lowest $9.60, median $9.60, highest $9.60.

As an outpatient, the same code is billed by 2 facilities here, median $51.00 — that is the price to compare if you are not being admitted.

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.