Total T4 test cost in Davenport, IA — inpatient
In Davenport-Moline-Rock Island, IA-IL, 4 hospitals list a cash price for total thyroxine (T4) blood test as an inpatient: from $22.80 to $55.00, with a median of $42.80. The lowest listed price is at MercyOne Genesis Aledo Medical Center — $20.00 less than the median here. Across Iowa, the median is $52.80 at 77 hospitals.
Cash prices at 4 facilities across 4 cities for code 84436, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Jan 28, 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 Davenport-Moline-Rock Island, IA-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| MercyOne Genesis Aledo Medical Center lowest Aledo, IL · (309) 582-9100 Thyroxine (T4)-Sendout File of Mar 31, 2026 · source file | $22.80 | $38.00 | $17.48–$27.74 | 40% |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Thyroxine (T4)-Sendout File of Mar 31, 2026 · source file | $30.60 | $51.00 | $16.32–$46.92 | 40% |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 GHS T4 File of Mar 31, 2026 · source file | $41.40 | $69.00 | $22.08–$63.48 | 40% |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 T4 (Throxine) Total - Quest+1 more line at this price File of Mar 31, 2026 · source file | $45.00 | $75.00 | $34.50–$54.75 | 40% |
| MercyOne Genesis Silvis Medical Center Silvis, IL · (309) 281-4000 Thyroxine+1 more line at this price File of Mar 31, 2026 · source file | $45.00 | $75.00 | $24.00–$69.00 | 40% |
| MercyOne Genesis Aledo Medical Center Aledo, IL · (309) 582-9100 GHS T4 File of Mar 31, 2026 · source file | $46.80 | $78.00 | $35.88–$56.94 | 40% |
| Trinity Rock Island Rock Island, IL · (309) 779-5000 HC THYROXINE; TOTAL File of Jan 28, 2026 · source file | $55.00 | $68.75 | $36.23 | 20% |
| Trinity - Bettendorf Bettendorf, IA · (563) 742-5000 HC THYROXINE; TOTAL File of Jan 28, 2026 · source file | $55.00 | $68.75 | $36.23 | 20% |
Inpatient: lowest $22.80, median $42.80, highest $55.00 — a 2.4× difference within the same market.
As an outpatient, the same code is billed by 7 facilities here, median $30.60 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 2 of 4 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 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.