Total T4 test cost in Fairfield, IL
In Fairfield, IL, 1 hospital lists a cash price for total thyroxine (T4) blood test: from $18.40 to $18.40, with a median of $18.40. Across Illinois, the median is $81.90 at 111 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 Mar 24, 2026 and Mar 24, 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 Fairfield, IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Fairfield Memorial Hospital lowest Fairfield, IL · (618) 842-2611 VET T4 File of Mar 24, 2026 · source file | $18.40 | $23.00 | $5.52–$120.60 | 20% |
| Fairfield Memorial Hospital Fairfield, IL · (618) 842-2611 T4 TOTAL File of Mar 24, 2026 · source file | $107.20 | $134.00 | $5.52–$120.60 | 20% |
Outpatient: lowest $18.40, median $18.40, highest $18.40.
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.