Free T3 test cost in Riverside, CA — inpatient
In Riverside-San Bernardino-Ontario, CA, 10 hospitals list a cash price for free T3 thyroid hormone test as an inpatient: from $9.51 to $137.25, with a median of $56.14. The lowest listed price is at Palo Verde Hospital — $46.63 less than the median here. Across California, the median is $63.50 at 97 hospitals.
Cash prices at 10 facilities across 8 cities 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 Sep 2, 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 Riverside-San Bernardino-Ontario, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Palo Verde Hospital lowest Blythe, CA Triiodothyronine (T3), Free LC | $9.51 | $12.68 | — | 25% | Jul 1, 2026 source file |
| Riverside University Medical Center Moreno Valley, CA HC Qu T3 Free | $41.25 | $41.25 | $11.98–$41.25 | — | — source file |
| Riverside University Medical Center Moreno Valley, CA HC Qu T3 Free | $41.25 | $41.25 | $11.98–$41.25 | — | — source file |
| Kaiser Foundation Hospital - Moreno Valley Moreno Valley, CA ASSAY OF TRIIODOTHYRONINE T3 FREE | $52.52 | $101.00 | $12.00–$35.00 | 48% | — source file |
| Kaiser Foundation Hospital - Riverside Riverside, CA ASSAY OF TRIIODOTHYRONINE T3 FREE | $52.52 | $101.00 | $12.00–$35.00 | 48% | — source file |
| Kaiser Foundation Hospital - Fontana Fontana, CA ASSAY OF TRIIODOTHYRONINE T3 FREE | $52.52 | $101.00 | $12.00–$35.00 | 48% | — source file |
| St Mary Medical Center Apple Valley, CA HC ASSAY OF TRIIODOTHYRONINE T3 FREE LAB | $59.76 | $124.50 | — | 52% | Apr 1, 2026 source file |
| Loma Linda University Medical Center - Murrieta Murrieta, CA HC TRIIODOTHYRONINE, FREE | $137.25 | $305.00 | $55.20–$228.75 | 55% | Sep 2, 2026 source file |
| Loma Linda University Behavioral Medicine Center Redlands, CA HC TRIIODOTHYRONINE, FREE | $137.25 | $305.00 | $167.75–$244.00 | 55% | Aug 31, 2026 source file |
| Loma Linda University Childrens Hospital Loma Linda, CA HC TRIIODOTHYRONINE, FREE | $137.25 | $305.00 | $61.00–$259.25 | 55% | Sep 2, 2026 source file |
| Loma Linda University Medical Center Loma Linda, CA HC TRIIODOTHYRONINE, FREE | $137.25 | $305.00 | $61.00–$274.50 | 55% | Sep 2, 2026 source file |
Inpatient: lowest $9.51, median $56.14, highest $137.25 — a 14.4× difference within the same market.
As an outpatient, the same code is billed by 14 facilities here, median $52.52 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 4 of 8 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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.
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 Mary Medical Center Apple Valley, CAHC ASSAY OF TRIIODOTHYRONINE T3 FREE CDM | $2.40 | file |