Rheumatoid factor test cost in Thief River Falls, MN — inpatient
In Thief River Falls, MN, 2 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $66.40 to $66.40, with a median of $66.40. The lowest listed price is at Sanford Behavioral Health Thief River Falls and 1 other hospital. Across Minnesota, the median is $40.55 at 50 hospitals.
Cash prices at 2 facilities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 4, 2026 and Mar 4, 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 Thief River Falls, MN.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Sanford Behavioral Health Thief River Falls lowest Thief River Falls, MN · (218) 683-4351 RHEUMATOID FACTOR PANEL SERUM 86431.900 | $66.40 | $83.00 | $44.47–$78.52 | 20% | Mar 4, 2026 source file |
| Sanford Thief River Falls Medical Center lowest Thief River Falls, MN · (218) 683-4400 RHEUMATOID FACTOR PANEL SERUM 86431.900 | $66.40 | $83.00 | $44.47–$78.52 | 20% | Mar 4, 2026 source file |
| Sanford Behavioral Health Thief River Falls Thief River Falls, MN · (218) 683-4351 RA FACTOR QUANT 86431 | $69.60 | $87.00 | $46.61–$82.30 | 20% | Mar 4, 2026 source file |
| Sanford Thief River Falls Medical Center Thief River Falls, MN · (218) 683-4400 RA FACTOR QUANT 86431 | $69.60 | $87.00 | $46.61–$82.30 | 20% | Mar 4, 2026 source file |
| Sanford Behavioral Health Thief River Falls Thief River Falls, MN · (218) 683-4351 RHEUMATOID FACTOR QUANT 86431 | $74.40 | $93.00 | $49.83–$87.98 | 20% | Mar 4, 2026 source file |
| Sanford Thief River Falls Medical Center Thief River Falls, MN · (218) 683-4400 RHEUMATOID FACTOR QUANT 86431 | $74.40 | $93.00 | $49.83–$87.98 | 20% | Mar 4, 2026 source file |
Inpatient: lowest $66.40, median $66.40, highest $66.40.
As an outpatient, the same code is billed by 2 facilities here, median $66.40 — 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.