Total T4 test cost in San Jose, CA
In San Jose-Sunnyvale-Santa Clara, CA, 4 hospitals list a cash price for total thyroxine (T4) blood test: from $8.52 to $39.20, with a median of $24.92. The lowest listed price is at Stanford Health Care — $16.40 less than the median here. Across California, the median is $39.20 at 183 hospitals.
Cash prices at 4 facilities across 4 cities for code 84436, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 31, 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 San Jose-Sunnyvale-Santa Clara, CA.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Stanford Health Care lowest Stanford, CA · (650) 723-4000 HC 6956 Thyroxine, Total | $8.52 | $21.29 | — | 60% | Apr 1, 2026 source file |
| Lucile Salter Packard Children's Hospital at Stanford Palo Alto, CA · (650) 497-8000 HC 114 Thyroxine, Total|TECHNICAL COMPONENT | $10.64 | $21.29 | $10.34 | 50% | Mar 31, 2026 source file |
| Lucile Salter Packard Children's Hospital at Stanford Palo Alto, CA · (650) 497-8000 HC 114 Thyroxine, Total | $10.64 | $21.29 | $10.34 | 50% | Mar 31, 2026 source file |
| Kaiser Foundation Hospital - San Jose San Jose, CA · (408) 972-7000 ASSAY OF THYROXINE TOTAL | $39.20 | $70.00 | $6.00–$20.00 | 44% | — source file |
| Kaiser Foundation Hospital - Santa Clara Santa Clara, CA · (408) 236-6400 ASSAY OF THYROXINE TOTAL | $39.20 | $70.00 | $6.00–$20.00 | 44% | — source file |
| Stanford Health Care Stanford, CA · (650) 723-4000 HC Thyroxine(T4) Total | $42.40 | $106.00 | — | 60% | Apr 1, 2026 source file |
| Lucile Salter Packard Children's Hospital at Stanford Palo Alto, CA · (650) 497-8000 HC Thyroxine (T4) Total|TECHNICAL COMPONENT | $53.00 | $106.00 | $51.51 | 50% | Mar 31, 2026 source file |
| Lucile Salter Packard Children's Hospital at Stanford Palo Alto, CA · (650) 497-8000 HC Thyroxine (T4) Total | $53.00 | $106.00 | $51.51 | 50% | Mar 31, 2026 source file |
Outpatient: lowest $8.52, median $24.92, highest $39.20 — a 4.6× difference within the same market.
As an inpatient, the same code is billed by 3 facilities here, median $39.20. 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 0 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
A total T4 test measures all the thyroxine hormone in the blood, both bound and free. Most doctors now order free T4 (84439) instead, which is less affected by pregnancy and medicines.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.
3 rows held back from this comparison
They are priced below $1 or below a tenth of the national median for code 84436 ($52.65). 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.
| El Camino Hospital Mountain View, CAHC 001149 T4 TOTAL* | $0.56 | file |
| Good Samaritan Hospital Los Gatos, CAThyroxine; total | $3.19 | file |
| Good Samaritan Hospital Los Gatos, CATHYROXINE T4 TOTAL | $3.19 | file |