Free T4 test cost in Charleston, SC — inpatient
In Charleston-North Charleston, SC, 5 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $32.00 to $226.20, with a median of $226.20. The lowest listed price is at MUSC Medical Center — $194.20 less than the median here. Across South Carolina, the median is $105.00 at 19 hospitals.
Cash prices at 5 facilities across 3 cities for code 84439, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Apr 1, 2026 and Apr 1, 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 Charleston-North Charleston, SC.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| MUSC Medical Center lowest Charleston, SC HB T4/THYROXINE FREE BY DIALYSIS - S (SEND OUT) | $32.00 | $64.00 | — | 50% | Apr 1, 2026 source file |
| MUSC Medical Center Charleston, SC HB THYROXINE FREE RIA ASSAY | $82.50 | $165.00 | — | 50% | Apr 1, 2026 source file |
| Roper St Francis Mount Pleasant Hospital Mount Pleasant, SC HC Assay of Free Thyroxine | $226.20 | $348.00 | — | 35% | — source file |
| Roper St Francis Hospital Berkeley INC Summerville, SC HC Assay of Free Thyroxine | $226.20 | $348.00 | — | 35% | — source file |
| Bon Secours St Francis Xavier Hospital INC Charleston, SC HC Assay of Free Thyroxine | $226.20 | $348.00 | — | 35% | — source file |
| Roper Hospital INC Charleston, SC HC Assay of Free Thyroxine | $226.20 | $348.00 | — | 35% | — source file |
Inpatient: lowest $32.00, median $226.20, highest $226.20 — a 7.1× difference within the same market.
As an outpatient, the same code is billed by 5 facilities here, median $226.20 — that is the price to compare if you are not being admitted.
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.