Free T4 test cost in South Dakota
In South Dakota, 6 hospitals publish a cash price for Free T4 (free thyroxine) thyroid blood test: from $46.14 to $101.60, with a median of $64.80. The lowest price is at Black Hills Surgical Hospital (Rapid City). The highest price is 2.2× the lowest.
Outpatient cash prices, one line per hospital — its lowest listed price for code 84439. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 23, 2026.
Hospitals in South Dakota, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Black Hills Surgical Hospital lowest Rapid City · Rapid City, SD THYROXINE FREE T4- | $46.14 | $76.90 | — source file |
| Sanford Canton Inwood Medical Center Canton · Sioux Falls, SD-MN ASSAY OF FREE THYROXINE 84439 | $60.80 | $76.00 | Mar 4, 2026 source file |
| Sanford Vermillion Hospital Vermillion · Vermillion, SD ASSAY OF FREE THYROXINE 84439 | $63.20 | $79.00 | Mar 4, 2026 source file |
| Sanford Clear Lake Medical Center Clear Lake · Clear Lake, SD ASSAY OF FREE THYROXINE 84439 | $66.40 | $83.00 | Mar 4, 2026 source file |
| Sanford Chamberlain Medical Center Chamberlain · Chamberlain, SD FREE T4 BY EQ DIALYSIS SO 84439.900 | $99.20 | $124.00 | Mar 4, 2026 source file |
| Sanford Webster Hospital Webster · Webster, SD ASSAY OF FREE THYROXINE 84439 | $101.60 | $127.00 | Mar 4, 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 |
|---|---|---|---|
| Chamberlain, SD | 1 | $99.20 | $99.20 |
| Clear Lake, SD | 1 | $66.40 | $66.40 |
| Rapid City, SD | 1 | $46.14 | $46.14 |
| Sioux Falls, SD-MN | 1 | $60.80 | $60.80 |
| Vermillion, SD | 1 | $63.20 | $63.20 |
| Webster, SD | 1 | $101.60 | $101.60 |
What it is
A free T4 test measures thyroxine that is not bound to proteins, the active form of the main thyroid hormone. It is usually ordered with or after a TSH test to check for an underactive or overactive thyroid and to adjust thyroid medicine.
What the price covers
The price usually covers the free T4 test only. The blood draw and the TSH test (84443) are billed separately.
Free T4 (free thyroxine) thyroid blood test in other states
- Alabama$74.96
- Alaska$68.40
- Arizona$17.45
- Arkansas$48.10
- California$68.12
- Colorado$49.00
- Connecticut$55.55
- Delaware$157.92
- Florida$70.60
- Georgia$137.67
- Hawaii$44.40
- Idaho$40.00
- Illinois$82.08
- Indiana$72.25
- Iowa$61.18
- Kansas$109.75
- Kentucky$113.03
- Louisiana$37.66
- Maine$55.38
- Maryland$44.06
- Massachusetts$43.62
- Michigan$37.00
- Minnesota$65.27
- Mississippi$24.48
- Missouri$87.90
- Montana$51.20
- Nebraska$63.84
- Nevada$65.41
- New Hampshire$78.53
- New Jersey$10.37
- New Mexico$125.20
- New York$48.47
- North Carolina$78.40
- North Dakota$32.13
- Ohio$40.30
- Oklahoma$61.33
- Oregon$44.25
- Pennsylvania$63.90
- Puerto Rico$18.00
- Rhode Island$72.00
- South Carolina$105.00
- Tennessee$27.50
- Texas$39.51
- Utah$84.43
- Vermont$114.00
- Virginia$57.00
- Washington$63.84
- West Virginia$45.75
- Wisconsin$70.85
- Wyoming$18.62
Median cash price across the state's hospitals.