Total T4 test cost in St. Louis, MO — inpatient
In St. Louis, MO-IL, 13 hospitals list a cash price for total thyroxine (T4) blood test as an inpatient: from $18.29 to $215.30, with a median of $67.90. The lowest listed price is at Ranken Jordan Pediatric Bridge Hospital — $49.61 less than the median here. Across Missouri, the median is $60.06 at 64 hospitals.
Cash prices at 13 facilities across 12 cities for code 84436, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Feb 6, 2026 and Aug 6, 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 St. Louis, MO-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Ranken Jordan Pediatric Bridge Hospital lowest Maryland Heights, MO · (314) 872-6400 Thyroxine | $18.29 | $22.86 | — | 20% | Apr 24, 2026 source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 THYROXINE T4,TOTAL | $23.24 | $38.73 | $38.73 | 40% | — source file |
| Mercy Rehabilitation Hospital South Louis, MO T-4 TOTAL (THYROXINE) | $23.80 | $23.80 | $23.80 | — | Mar 16, 2026 source file |
| Mercy Rehabilitation Hospital South Louis, MO T4 | $23.80 | $23.80 | $23.80 | — | Mar 16, 2026 source file |
| Mercy Rehabilitation Hospital St. Louis Chesterfield, MO T4 | $47.54 | $47.54 | $47.54 | — | Mar 16, 2026 source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL · (618) 234-2120 HC THYROXINE (T-4) TOTAL | $53.28 | $74.00 | $6.87–$74.00 | 28% | — source file |
| Community Hospital of Staunton Staunton, IL · (618) 635-2200 THYROXINE (T4) | $55.70 | $111.40 | $94.69–$101.37 | 50% | Feb 9, 2026 source file |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 T7-TT4 | $67.90 | $97.00 | $60.33–$3,396.04 | 30% | — source file |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 T4 (TOTAL) REF | $71.40 | $102.00 | $63.44–$3,396.04 | 30% | — source file |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 HC THYROXINE (T-4) TOTAL | $74.88 | $104.00 | $6.87–$104.00 | 28% | — source file |
| Carlinville Area Hospital Carlinville, IL · (217) 854-3141 ASSOC CHG TOTAL T4 REF | $81.20 | $116.00 | $72.15–$3,396.04 | 30% | — source file |
| Jersey Community Hospital Jerseyville, IL · (618) 498-6402 T3 Uptake QST | $90.00 | $90.00 | $47.07–$76.50 | — | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC THYROXINE (T-4) TOTAL-90 | $100.08 | $139.00 | $6.87–$139.00 | 28% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 HC THYROXINE (T-4) TOTAL | $108.72 | $151.00 | $6.87–$151.00 | 28% | — source file |
| Anderson Hospital Maryville, IL · (618) 288-5711 THYROXINE (T4) | $110.90 | $221.80 | $166.35–$199.62 | 50% | Feb 6, 2026 source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC THYROXINE (T-4) TOTAL | $133.92 | $186.00 | $13.74–$186.00 | 28% | — source file |
| Mercy Rehabilitation Hospital St. Louis Chesterfield, MO T-4 TOTAL (THYROXINE) | $180.68 | $180.68 | $180.68 | — | Mar 16, 2026 source file |
| St Lukes Rehabilitation Hospital Chesterfield, MO Total Thyroxine | $215.30 | $215.30 | $150.71–$161.48 | — | Aug 6, 2026 source file |
Inpatient: lowest $18.29, median $67.90, highest $215.30 — a 11.8× difference within the same market.
As an outpatient, the same code is billed by 17 facilities here, median $55.70 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 8 of 12 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 3 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.