Rheumatoid factor test cost in Idaho
In Idaho, 9 hospitals publish a cash price for rheumatoid factor (RF) test: from $7.50 to $59.50, with a median of $13.84. The lowest price is at Kootenai Health (Coeur D'Alene). The highest price is 7.9× the lowest.
Outpatient cash prices, one line per hospital — its lowest listed price for code 86431. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 23, 2026.
Hospitals in Idaho, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Kootenai Health lowest Coeur D'Alene · Coeur d'Alene, ID HC MAYO RAPAN-RHEUMATOID ARTHRITIS PANEL, SERUM | $7.50 | $10.00 | Mar 27, 2026 source file |
| St Luke's Magic Valley Regional Medical Center Twin Falls · Twin Falls, ID | $13.84 | $13.84 | — source file |
| St Luke's McCall McCall · McCall, ID | $13.84 | $13.84 | — source file |
| St Luke's Nampa Medical Center Nampa · Boise City, ID | $13.84 | $13.84 | — source file |
| St Luke's Regional Medical Center Boise · Boise City, ID | $13.84 | $13.84 | — source file |
| St Luke's Wood River Medical Center Ketchum · Hailey, ID | $13.84 | $13.84 | — source file |
| Saint Alphonsus Medical Center - Nampa Nampa · Boise City, ID HC Rheumatoid Factor Quantitative | $29.90 | $46.00 | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise · Boise City, ID HC Rheumatoid Factor Quantitative | $29.90 | $46.00 | Mar 31, 2026 source file |
| Bingham Memorial Hospital Blackfoot · Blackfoot, ID Rheumatoid factor level | $59.50 | $85.00 | Feb 2, 2026 source file |
By metro area
Each metro page compares every listing, including prices for both sides of the body.
| Metro area | Hospitals | Lowest | Median |
|---|---|---|---|
| Boise City, ID | 4 | $13.84 | $21.87 |
| Blackfoot, ID | 1 | $59.50 | $59.50 |
| Coeur d'Alene, ID | 1 | $7.50 | $7.50 |
| Hailey, ID | 1 | $13.84 | $13.84 |
| McCall, ID | 1 | $13.84 | $13.84 |
| Twin Falls, ID | 1 | $13.84 | $13.84 |
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.
Rheumatoid factor (RF) test in other states
- Alabama$118.75
- Alaska$44.46
- Arizona$10.50
- Arkansas$41.89
- California$13.20
- Colorado$26.20
- Connecticut$38.53
- Delaware$54.98
- Florida$19.29
- Georgia$79.56
- Hawaii$18.60
- Illinois$37.50
- Indiana$33.60
- Iowa$41.78
- Kansas$26.48
- Kentucky$119.25
- Louisiana$20.07
- Maine$32.20
- Maryland$27.44
- Massachusetts$23.92
- Michigan$35.28
- Minnesota$40.55
- Mississippi$39.16
- Missouri$36.04
- Montana$36.80
- Nebraska$37.22
- Nevada$10.37
- New Hampshire$30.81
- New Jersey$6.52
- New Mexico$29.20
- New York$25.63
- North Carolina$67.50
- North Dakota$23.36
- Ohio$31.85
- Oklahoma$28.68
- Oregon$40.30
- Pennsylvania$39.20
- Rhode Island$45.00
- South Carolina$80.00
- South Dakota$43.10
- Tennessee$18.81
- Texas$20.70
- Utah$71.26
- Vermont$60.43
- Virginia$16.35
- Washington$31.95
- West Virginia$36.50
- Wisconsin$57.50
- Wyoming$21.29
Median cash price across the state's hospitals.