Free T3 test cost in Eureka, CA
In Eureka-Arcata, CA, 2 hospitals list a cash price for Free T3 thyroid hormone test: from $18.87 to $63.50, with a median of $41.19. The lowest listed price is at St Joseph Health Northern California LLC — $22.32 less than the median here. Across California, the median is $63.50 at 97 hospitals.
Cash prices at 2 facilities across 2 cities for code 84481, as an outpatient — the setting a self-pay patient normally buys. 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 Eureka-Arcata, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| St Joseph Health Northern California LLC lowest Fortuna, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $18.87 | $37.00 | — | 49% | Apr 1, 2026 source file |
| St Joseph Health Northern California LLC Fortuna, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE LAB | $63.50 | $124.50 | — | 49% | Apr 1, 2026 source file |
| St Joseph Health Northern California LLC Eureka, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE LAB | $63.50 | $124.50 | — | 49% | Apr 1, 2026 source file |
| St Joseph Health Northern California LLC Eureka, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $112.71 | $221.00 | — | 49% | Apr 1, 2026 source file |
Outpatient: lowest $18.87, median $41.19, highest $63.50 — a 3.4× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $63.50. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
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.
2 rows held back from this comparison
They are 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 Fortuna, CAHC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $2.55 | file |
| St Joseph Health Northern California LLC Eureka, CAHC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $2.55 | file |