Total T4 test cost in Ann Arbor, MI — inpatient
In Ann Arbor, MI, 3 hospitals list a cash price for total thyroxine (T4) blood test as an inpatient: from $18.85 to $47.31, with a median of $41.20. The lowest listed price is at St Joseph Mercy Chelsea — $22.35 less than the median here. Across Michigan, the median is $37.40 at 81 hospitals.
Cash prices at 3 facilities across 3 cities for code 84436, as an inpatient (admitted to hospital) . Collected Sep 27, 2026; the hospital files themselves were last updated between Mar 31, 2026 and Mar 31, 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 Ann Arbor, MI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| St Joseph Mercy Chelsea lowest Chelsea, MI · (734) 475-3911 HC Warde T4 (Thyroxine) Total File of Mar 31, 2026 · source file | $18.85 | $29.00 | $3.76–$29.00 | 35% |
| St Joseph Mercy Chelsea Chelsea, MI · (734) 475-3911 HC T4 (Thyroxine) Total File of Mar 31, 2026 · source file | $22.10 | $34.00 | $3.76–$34.00 | 35% |
| University of Michigan Health Ann Arbor, MI · (734) 764-1505 HC-Lab-T4 (Thyroxine) Total source file | $41.20 | $103.00 | $44.29–$109.48 | 60% |
| Forest Health Medical Center Ypsilanti, MI · (734) 547-4700 THYROXINE TOTAL source file | $47.31 | $47.31 | $6.87–$33.12 | — |
Inpatient: lowest $18.85, median $41.20, highest $47.31 — a 2.5× difference within the same market.
As an outpatient, the same code is billed by 3 facilities here, median $41.20 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 2 of 3 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 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.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 84436 ($52.00). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Hospital | Cash price | File |
|---|---|---|
| St Joseph Mercy Chelsea Chelsea, MIHC Warde 3400847 T4 (Thyroxine) Total | $4.48 | file |