Total T4 test cost in Centralia, IL
In Centralia, IL, 1 hospital lists a cash price for total thyroxine (T4) blood test: from $43.90 to $43.90, with a median of $43.90. Across Illinois, the median is $81.90 at 112 hospitals.
Cash prices at 1 facility for code 84436, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 27, 2026; the hospital files themselves were last updated between Dec 3, 2025 and Dec 3, 2025.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Salem Township Hospital Salem, IL · (618) 548-3194 HC ASSAY OF TOTAL THYROXINE File of Dec 3, 2025 · source file | $43.90 | $109.75 | $21.51–$80.78 | 60% |
Outpatient: lowest $43.90, median $43.90, highest $43.90.
As an inpatient, the same code is billed by 1 facility here, median $43.90. 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 the one hospital here that publishes insurer rates for this code, the cash price is 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.