Free T3 test cost in Napa, CA — inpatient
In Napa, CA, 1 hospital lists a cash price for free T3 thyroid hormone test as an inpatient: from $63.50 to $63.50, with a median of $63.50. Across California, the median is $63.50 at 97 hospitals.
Cash prices at 1 facility for code 84481, 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.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| St Joseph Health Northern California LLC Napa, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE LAB | $63.50 | $124.50 | — | 49% | Apr 1, 2026 source file |
Inpatient: lowest $63.50, median $63.50, highest $63.50.
As an outpatient, the same code is billed by 1 facility here, median $63.50 — that is the price to compare if you are not being admitted.
What it is
Free T3 is the active thyroid hormone not bound to proteins. It is usually checked after TSH (84443) and free T4 (84439), mainly when an overactive thyroid is suspected.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 84481 ($85.20). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| St Joseph Health Northern California LLC Napa, CAHC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $2.55 | file |