Free T4 test cost in Appleton, WI
In Appleton, WI, 4 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $34.20 to $50.16, with a median of $36.74. The lowest listed price is at Ascension NE Wisconsin - St Elizabeth Campus — $2.54 less than the median here. Across Wisconsin, the median is $70.85 at 81 hospitals.
Cash prices at 4 facilities across 2 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 — and —.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Appleton, WI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Ascension NE Wisconsin - St Elizabeth Campus lowest Appleton, WI · (920) 738-2000 HC ASSAY OF FREE THYROXINE | $34.20 | $60.00 | $9.47–$20.26 | 43% | — source file |
| ThedaCare Regional Medical Center-Appleton Appleton, WI T4, FREE | $36.74 | $65.60 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Appleton Appleton, WI ASSAY OF FREE THYROXINE | $36.74 | $65.60 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Appleton Appleton, WI · (920) 731-4101 T4, FREE | $36.74 | $65.60 | — | 44% | — source file |
| ThedaCare Regional Medical Center-Appleton Appleton, WI · (920) 731-4101 ASSAY OF FREE THYROXINE | $36.74 | $65.60 | — | 44% | — source file |
| Ascension Calumet Hospital Chilton, WI · (920) 849-2386 HC ASSAY OF FREE THYROXINE | $50.16 | $88.00 | $9.47–$20.26 | 43% | — source file |
Outpatient: lowest $34.20, median $36.74, highest $50.16 — a 1.5× difference within the same market.
Cash or insurance?
At 0 of 2 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at none is it 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.