Free T4 (thyroid) test at Henry Ford Health St. John Hospital
CPT 84439 · Detroit, MI
These are Henry Ford Health St. John Hospital's own posted figures from its standard-charges file dated January 1, 2026. They are not a quote. Source: the hospital's file · its price transparency page.
Across 19 Michigan hospitals we index that post a cash price for this service: lowest $12.45, median $78.65, highest $448.50. See every hospital.
Nearby hospitals, same service
| Hospital | Distance | Cash price | Gross charge | File date |
|---|---|---|---|---|
| Henry Ford Health Warren Hospital Warren, MI | 9.0 mi | $40.32 | $72.00 | 2026-01-01 |
| Henry Ford Health Hospital Detroit, MI | 10.0 mi | $12.45 | $60.00 | 2026-06-28 |
| Harper University Hospital Detroit, MI | 10.0 mi | $402.00 | $536.00 | 2026-09-02 |
| Detroit Receiving Hospital Detroit, MI | 10.0 mi | $246.75 | $329.00 | 2026-04-07 |
| Karmanos Cancer Center Detroit, MI | 10.0 mi | $103.95 | $207.90 | 2025-12-31 |
| Children's Hospital of Michigan Detroit, MI | 10.0 mi | $323.25 | $431.00 | 2026-04-06 |
| McLaren Macomb Mount Clemens, MI | 12.1 mi | $78.65 | $157.30 | 2025-12-31 |
| Henry Ford Macomb Hospital Clinton Township, MI | 12.7 mi | $12.45 | $60.00 | 2026-06-28 |
Distances are straight-line from ZIP code centers. Each hospital's figures come from its own file; files are updated on different dates.
Every row for CPT 84439 in this hospital's file
| Row in the hospital's file | Setting | Cash | Gross | Insurer min – max |
|---|---|---|---|---|
| THYROXINE FREE T4 line 279072 | both | $38.08 | $68.00 | $7.35 – $18.06 |
| THYROXINE FREE T4 line 277739 | both | $36.96 | $66.00 | $7.35 – $18.06 |
| THYROXINE FREE T4 line 377784 | outpatient | $36.96 | $66.00 | $7.35 – $18.06 |
| THYROXINE FREE T4 line 380815 | outpatient | $38.08 | $68.00 | $7.35 – $18.06 |
| ASSAY OF FREE THYROXINE line 417892 | inpatient | $8.57 – $17.14 | ||
| ASSAY OF FREE THYROXINE line 417895 | outpatient | $8.57 – $17.14 | ||
| ASSAY OF FREE THYROXINE line 517715 | both | $7.35 – $18.06 |
The first row is the one used above. A price for one code usually covers the hospital's facility charge only; the doctor, anesthesia, pathology and other services can be billed separately. Ask the hospital for a good faith estimate before a scheduled service: if you pay yourself and the bill comes in $400 or more above the estimate, you can dispute it under the No Surprises Act.
Check a bill from this hospital All Henry Ford Health St. John Hospital prices