Free T4 test cost in Portland, ME
In Portland-South Portland, ME, 6 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $23.40 to $387.20, with a median of $57.98. The lowest listed price is at York Hospital — $34.58 less than the median here. Across Maine, the median is $55.38 at 22 hospitals.
Cash prices at 6 facilities across 5 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Sep 9, 2025 and Apr 29, 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 Portland-South Portland, ME.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| York Hospital lowest York, ME · (207) 351-2478 FREE T4 DIRECT DIALYSIS | $23.40 | $39.00 | — | 40% | — source file |
| MaineHealth Brunswick, ME · (207) 729-0181 HC ASSAY OF FREE THYROXINE | $26.75 | $26.75 | $9.02–$25.25 | — | Sep 9, 2025 source file |
| Mercy Hospital Portland, ME THYROXINE FREE | $37.96 | $146.00 | $77.96–$111.25 | 74% | — source file |
| Mercy Hospital Portland, ME T4 FREE DIRECT DIALYSIS | $37.96 | $146.00 | $77.96–$111.25 | 74% | — source file |
| Mercy Hospital Portland, ME FREE T4/LAB | $37.96 | $146.00 | $77.96–$111.25 | 74% | — source file |
| York Hospital York, ME · (207) 351-2478 THYROID REFLEX 2 | $43.80 | $73.00 | — | 40% | — source file |
| York Hospital York, ME · (207) 351-2478 T4 FREE | $43.80 | $73.00 | — | 40% | — source file |
| York Hospital York, ME · (207) 351-2478 THYROID REFLEX 1 | $43.80 | $73.00 | — | 40% | — source file |
| Bridgton Hospital Bridgton, ME · (207) 647-6000 HC ASSAY OF FREE THYROXINE | $78.00 | $252.50 | $9.02–$229.02 | 69% | Apr 29, 2026 source file |
| MaineHealth Biddeford, ME HC ASSAY OF FREE THYROXINE | $82.95 | $82.95 | $9.02–$77.97 | — | Sep 9, 2025 source file |
| York Hospital York, ME · (207) 351-2478 T4, THYROXINE, FREE | $96.60 | $161.00 | — | 40% | — source file |
| MaineHealth Portland, ME · (207) 662-0111 B* HC ASSAY OF FREE THYROXINE | $387.20 | $387.20 | $9.02–$363.97 | — | Sep 9, 2025 source file |
Outpatient: lowest $23.40, median $57.98, highest $387.20 — a 16.5× difference within the same market.
As an inpatient, the same code is billed by 5 facilities here, median $37.96. 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 2 of 5 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is 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 free T4 test measures thyroxine that is not bound to proteins, the active form of the main thyroid hormone. It is usually ordered with or after a TSH test to check for an underactive or overactive thyroid and to adjust thyroid medicine.
What the price covers
The price usually covers the free T4 test only. The blood draw and the TSH test (84443) are billed separately.