Free T3 test cost in Oxnard, CA
In Oxnard-Thousand Oaks-Ventura, CA, 3 hospitals list a cash price for free T3 thyroid hormone test: from $66.82 to $968.11, with a median of $70.52. The lowest listed price is at Dignity Health — $3.70 less than the median here. Across California, the median is $63.50 at 142 hospitals.
Cash prices at 3 facilities across 3 cities for code 84481, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Feb 28, 2026 and Sep 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 Oxnard-Thousand Oaks-Ventura, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Dignity Health lowest Camarillo, CA TRIIODOTHYRONINE FREE | $66.82 | $161.00 | $16.94–$161.00 | 58% | Feb 28, 2026 source file |
| Dignity Health Oxnard, CA · (805) 988-2500 TRIIODOTHYRONINE FREE | $70.52 | $161.00 | $16.94–$161.00 | 56% | Feb 28, 2026 source file |
| Los Robles Hospital and Medical Center Thousand Oaks, CA · (805) 497-2727 T3 FREE | $968.11 | $968.11 | $145.22–$968.11 | — | Sep 1, 2026 source file |
Outpatient: lowest $66.82, median $70.52, highest $968.11 — a 14.5× difference within the same market.
As an inpatient, the same code is billed by 2 facilities here, median $68.67. Inpatient and outpatient prices are not comparable and are kept on separate pages: the inpatient charge covers admission, not the same purchase.
Cash or insurance?
At 2 of 3 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it below every plan's rate. 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
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 ($94.40). 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.
| Dignity Health Camarillo, CARL-A-FT3 70133 | $2.08 | file |
| Dignity Health Oxnard, CARL-A-FT3 70133 | $2.19 | file |