Free T3 test cost in Rockford, IL — inpatient
In Rockford, IL, 1 hospital lists a cash price for free T3 thyroid hormone test as an inpatient: from $344.87 to $344.87, with a median of $344.87. Across Illinois, the median is $94.67 at 103 hospitals.
Cash prices at 1 facility for code 84481, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Mar 1, 2026 and Mar 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 Rockford, IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Rockford Memorial Hospital lowest Rockford, IL · (815) 968-6861 CHG ASSAY OF TRIIODOTHYRONINE T3 FREE | $344.87 | $459.83 | — | 25% | Mar 1, 2026 source file |
| Rockford Memorial Hospital lowest Rockford, IL · (815) 968-6861 CHG ASSAY OF TRIIODOTHYRONINE T3 FREE | $344.87 | $459.83 | — | 25% | Mar 1, 2026 source file |
Inpatient: lowest $344.87, median $344.87, highest $344.87.
As an outpatient, the same code is billed by 1 facility here, median $344.87 — that is the price to compare if you are not being admitted.
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.