Free T4 test cost in Sioux City, IA — inpatient
In Sioux City, IA-NE-SD, 1 hospital lists a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $22.40 to $22.40, with a median of $22.40. Across Iowa, the median is $61.18 at 37 hospitals.
Cash prices at 1 facility for code 84439, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Jan 28, 2026 and Jan 28, 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 Sioux City, IA-NE-SD.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Northwest Iowa Hospital Corporation lowest Sioux City, IA ASSAY OF FREE THYROXINE | $22.40 | $28.00 | $5.41–$14.75 | 20% | Jan 28, 2026 source file |
| Northwest Iowa Hospital Corporation Sioux City, IA HC FREE THYROXINE | $55.00 | $68.75 | $43.24 | 20% | Jan 28, 2026 source file |
Inpatient: lowest $22.40, median $22.40, highest $22.40.
As an outpatient, the same code is billed by 1 facility here, median $22.40 — 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
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.