Total T4 test cost in New Canaan, CT
In New Canaan, CT, 1 hospital lists a cash price for total thyroxine (T4) blood test: from $27.00 to $27.00, with a median of $27.00. Across Connecticut, the median is $33.60 at 17 hospitals.
Cash prices at 1 facility for code 84436, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 22, 2026; the hospital files themselves were last updated between Sep 1, 2026 and Sep 1, 2026.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Silver Hill Hospital New Canaan, CT · (203) 966-3561 Thyroxine (thyroid chemical), total | $27.00 | $27.00 | $13.50–$16.20 | — | Sep 1, 2026 source file |
Outpatient: lowest $27.00, median $27.00, highest $27.00.
Cash or insurance?
At the one hospital here that publishes insurer rates for this code, the cash price is not below the highest rate a health plan has negotiated. 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.