Free T4 test cost in Columbia, MO — inpatient
In Columbia, MO, 2 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $35.23 to $44.22, with a median of $39.73. The lowest listed price is at Boone Hospital Center — $4.50 less than the median here. Across Missouri, the median is $87.90 at 30 hospitals.
Cash prices at 2 facilities for code 84439, as an inpatient (admitted to hospital) . Collected Sep 22, 2026; the hospital files themselves were last updated between Dec 15, 2025 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 Columbia, MO.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Boone Hospital Center lowest Columbia, MO THYROXINE FREE | $35.23 | $58.71 | — | 40% | Apr 1, 2026 source file |
| Curators of the University of Missouri Columbia, MO THYROXINE FREE P31020231 | $44.22 | $73.70 | $20.05–$64.86 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO THYROXINE FREE P28620231 | $44.22 | $73.70 | $20.05–$64.86 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO THYROXINE; TOTAL, FREE P31037155 | $56.13 | $93.55 | $25.45–$82.32 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO THYROXINE; TOTAL, FREE P28637155 | $56.13 | $93.55 | $25.45–$82.32 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO ASSAY OF FREE THYROXINE P28634101 | $59.19 | $98.65 | $26.83–$86.81 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO T4 (THYROXINE) FREE BY DIALYSIS (FRT4D) P31032419 | $59.19 | $98.65 | $26.83–$86.81 | 40% | Dec 15, 2025 source file |
| Curators of the University of Missouri Columbia, MO T4 (THYROXINE) FREE BY DIALYSIS (FRT4D) P28632419 | $59.19 | $98.65 | $26.83–$86.81 | 40% | Dec 15, 2025 source file |
Inpatient: lowest $35.23, median $39.73, highest $44.22 — a 1.3× difference within the same market.
As an outpatient, the same code is billed by 2 facilities here, median $39.73 — 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 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.