Rheumatoid factor test cost in Grand Rapids, MI — inpatient
In Grand Rapids-Wyoming-Kentwood, MI, 5 hospitals list a cash price for rheumatoid factor (RF) test as an inpatient: from $37.00 to $50.00, with a median of $50.00. The lowest listed price is at Mary Free Bed Rehabilitation Hospital — $13.00 less than the median here. Across Michigan, the median is $35.28 at 58 hospitals.
Cash prices at 5 facilities across 4 cities for code 86431, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Grand Rapids-Wyoming-Kentwood, MI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Mary Free Bed Rehabilitation Hospital lowest Grand Rapids, MI HC WARDE RHEUMATOID FACTOR QUANTITATIVE | $37.00 | $37.00 | $23.37–$35.41 | — | — source file |
| Mary Free Bed Rehabilitation Hospital Grand Rapids, MI HCHG RHEUMATOID FACTOR QUANT | $39.00 | $39.00 | $24.63–$37.32 | — | — source file |
| Corewell Health Greenville Hospital Greenville, MI · (616) 754-4691 Hc Rheumatoid Factor Quant | $50.00 | $50.00 | — | — | — source file |
| Corewell Health Blodgett Hospital East Grand Rapids, MI Hc Rheumatoid Factor Quant | $50.00 | $50.00 | — | — | — source file |
| Corewell Health Zeeland Community Hospital Zeeland, MI · (616) 772-4644 Hc Rheumatoid Factor Quant | $50.00 | $50.00 | — | — | — source file |
| Corewell Health Butterworth Hospital Grand Rapids, MI · (616) 391-1774 Hc Rheumatoid Factor Quant | $50.00 | $50.00 | — | — | — source file |
| Corewell Health Butterworth Hospital Grand Rapids, MI · (616) 391-1774 Hc Rheumatoid Factor Quant | $50.00 | $50.00 | — | — | — source file |
Inpatient: lowest $37.00, median $50.00, highest $50.00 — a 1.4× difference within the same market.
As an outpatient, the same code is billed by 4 facilities here, median $50.00 — 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 not 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.