Free T4 test cost in Detroit, MI
In Detroit-Warren-Dearborn, MI, 30 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $5.89 to $402.00, with a median of $26.00. The lowest listed price is at St Mary Mercy Livonia and 2 other hospitals — $20.11 less than the median here. Across Michigan, the median is $31.00 at 96 hospitals.
- The median here, $26.00, is 61% below the US median of $66.50.
- That is 2.9× Medicare's 2026 national rate for the same service ($9.02).
- Detroit, MI has the lowest median of 2 metro areas in Michigan with at least 10 hospitals pricing this code.
- 9 of 30 hospitals list a cash price equal to their full list price, with no self-pay discount.
Cash prices at 30 facilities across 22 cities for code 84439, as an outpatient — the setting a self-pay patient normally buys. Collected Oct 26, 2026; the hospital files themselves were last updated between Dec 31, 2025 and Sep 2, 2026.
Lowest$5.89St Mary Mercy Livonia + 2 more
Median$26.00half of hospitals charge less
Highest$402.00in this market
Difference68.3×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Detroit-Warren-Dearborn, MI.
median
Lowest $5.89Highest $448.50
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| St Mary Mercy Livonia lowest Livonia, MI · (734) 655-4800 HC Warde 3400847 T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $5.89 | $9.06 | $2.56–$35.28 | 35% |
| St Joseph Mercy Livingston Hospital lowest Brighton, MI · (517) 545-6000 HC Warde 3400847 T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $5.89 | $9.06 | $1.98–$32.52 | 35% |
| St Joseph Mercy Oakland lowest Pontiac, MI · (248) 858-3000 HC Warde 3400847 T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $5.89 | $9.06 | $2.75–$29.88 | 35% |
| St Mary Mercy Livonia Livonia, MI · (734) 655-4800 HC Warde T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $7.51 | $11.55 | $3.26–$35.28 | 35% |
| St Joseph Mercy Livingston Hospital Brighton, MI · (517) 545-6000 HC Warde T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $7.51 | $11.55 | $2.53–$32.52 | 35% |
| St Joseph Mercy Oakland Pontiac, MI · (248) 858-3000 HC Warde T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $7.51 | $11.55 | $3.51–$29.88 | 35% |
| Henry Ford Health West Bloomfield Hospital West Bloomfield, MI · (248) 325-1000 HB LAB THYROXINE TOTAL FREE+1 more line at this price File of Jun 28, 2026 · source file | $12.45 | $60.00 | $4.72–$31.71 | 79% |
| Henry Ford Health Hospital Detroit, MI · (313) 916-2600 HB LAB THYROXINE TOTAL FREE+1 more line at this price File of Jun 28, 2026 · source file | $12.45 | $60.00 | $4.72–$26.85 | 79% |
| Surgeons Choice Medical Center Southfield, MI FREE THYROXINE+1 more line at this price File of May 8, 2026 · source file | $13.00 | $13.00 | $7.96–$8.84 | — |
| Henry Ford Rochester Hospital Rochester, MI · (248) 652-5000 FREE T4 File of Jan 1, 2026 · source file | $13.63 | $29.00 | $10.71–$11.64 | 53% |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 T4 FREE BY DIALYSIS File of Dec 31, 2025 · source file | $18.85 | $37.70 | $4.93–$28.28 | 50% |
| Ascension River District Hospital East China Township, MI · (810) 329-7111 THYROXINE; FREE T4+1 more line at this price File of Jan 1, 2026 · source file | $21.85 | $39.02 | $12.30–$18.06 | 44% |
| Henry Ford Health Warren Hospital Warren, MI · (586) 573-5000 THYROXINE; FREE T4+1 more line at this price File of Jan 1, 2026 · source file | $24.08 | $43.00 | $12.30–$18.06 | 44% |
| Corewell Health Farmington Hills Hospital Farmington Hills, MI · (248) 471-8000 HC FREE T4 BY DIALYSIS MAYO File of May 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Free T4 By Dialysis Mayo+1 more line at this price File of Apr 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Beaumont Hospital Royal Oak Royal Oak, MI · (248) 898-5400 HC FREE T4 BY DIALYSIS MAYO File of May 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc Free T4 By Dialysis Mayo+1 more line at this price File of Apr 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Beaumont Hospital - Grosse Pointe Grosse Pointe, MI · (313) 473-1000 Hc Free T4 By Dialysis Mayo+1 more line at this price File of Apr 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Free T4 By Dialysis Mayo+1 more line at this price File of Apr 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Beaumont Hospital - Dearborn Dearborn, MI · (313) 593-7125 HC FREE T4 BY DIALYSIS MAYO File of May 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Beaumont Hospital, Troy Troy, MI · (248) 964-8800 Hc Free T4 By Dialysis Mayo+1 more line at this price File of Apr 1, 2026 · source file | $26.00 | $26.00 | — | — |
| Henry Ford Health St John Hospital Detroit, MI · (313) 343-4000 THYROXINE FREE T4+1 more line at this price File of Jan 1, 2026 · source file | $36.96 | $66.00 | $7.35–$18.06 | 44% |
| Beaumont Hospital - Grosse Pointe Grosse Pointe, MI · (313) 473-1000 Hc Free T4+1 more line at this price File of Apr 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Beaumont Hospital, Troy Troy, MI · (248) 964-8800 Hc Free T4+1 more line at this price File of Apr 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Beaumont Hospital Royal Oak Royal Oak, MI · (248) 898-5400 HC FREE T4 File of May 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Free T4+1 more line at this price File of Apr 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Corewell Health Farmington Hills Hospital Farmington Hills, MI · (248) 471-8000 HC FREE T4 File of May 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Free T4+1 more line at this price File of Apr 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Beaumont Hospital - Dearborn Dearborn, MI · (313) 593-7125 HC FREE T4 File of May 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 HC FREE T4+1 more line at this price File of May 1, 2026 · source file | $40.00 | $40.00 | — | — |
| Henry Ford Providence Novi Hospital - Novi Campus Novi, MI · (248) 849-3000 THYROXINE, FREE (FT-4)+1 more line at this price File of Jan 1, 2026 · source file | $42.56 | $76.00 | $6.08–$16.20 | 44% |
| Henry Ford Providence Southfield Hospital Southfield, MI · (248) 849-3000 THYROXINE, FREE (FT-4)+1 more line at this price File of Jan 1, 2026 · source file | $42.56 | $76.00 | $6.08–$16.20 | 44% |
| St Joseph Mercy Livingston Hospital Brighton, MI · (517) 545-6000 HC T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $48.10 | $74.00 | $4.93–$74.00 | 35% |
| St Mary Mercy Livonia Livonia, MI · (734) 655-4800 HC T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $48.10 | $74.00 | $4.93–$74.00 | 35% |
| St Joseph Mercy Oakland Pontiac, MI · (248) 858-3000 HC T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $48.10 | $74.00 | $4.93–$74.00 | 35% |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 ASSAY OF FREE THYROXINE File of Dec 31, 2025 · source file | $51.30 | $102.60 | $4.93–$52.12 | 50% |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 T4 Free Level File of Dec 31, 2025 · source file | $53.10 | $106.20 | $4.93–$79.65 | 50% |
| McLaren Macomb Mount Clemens, MI · (586) 493-8000 T4 Free Level File of Dec 31, 2025 · source file | $78.65 | $157.30 | $4.93–$97.13 | 50% |
| McLaren Oakland Pontiac, MI · (248) 338-5000 T4 Free Level File of Dec 31, 2025 · source file | $78.65 | $157.30 | $4.93–$121.48 | 50% |
| McLaren Lapeer Region Lapeer, MI · (810) 667-5500 T4 Free Level File of Dec 31, 2025 · source file | $78.65 | $157.30 | $4.93–$82.43 | 50% |
| VHS Sinai Grace Hospital Detroit, MI · (313) 966-3300 THYROXINE FREE File of Apr 8, 2026 · source file | $78.75 | $105.00 | — | 25% |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 THYROXINE, FREE File of Dec 31, 2025 · source file | $103.95 | $207.90 | $4.93–$155.93 | 50% |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 FREE THYROXINE INDEX File of Apr 6, 2026 · source file | $134.25 | $179.00 | — | 25% |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 FREE T4, DIRECT DIALYSIS File of Apr 6, 2026 · source file | $140.25 | $187.00 | — | 25% |
| VHS Detroit Receiving Hospital Detroit, MI · (313) 745-2941 THYROXINE FREE File of Apr 7, 2026 · source file | $246.75 | $329.00 | — | 25% |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 THYROXINE FREE File of Apr 6, 2026 · source file | $323.25 | $431.00 | — | 25% |
| VHS Huron Valley-Sinai Hospital Commerce Charter Twp, MI · (248) 937-3370 THYROXINE FREE File of May 20, 2026 · source file | $343.50 | $458.00 | $1.00–$12.30 | 25% |
| Harper University Hospital Detroit, MI · (313) 745-6211 THYROXINE FREE+1 more line at this price File of Aug 20, 2026 · source file | $402.00 | $536.00 | $1.00–$12.30 | 25% |
| St Mary Mercy Livonia Livonia, MI · (734) 655-4800 HC T4 (Thyroxine) Free File of Mar 31, 2026 · source file | $448.50 | — | $4.93–$35.28 | — |
Hospital The hospital that published the price, its city and the line exactly as written in its price file.
Cash price The hospital's own price for a patient paying without insurance (“discounted cash” in its price file). Hospitals must publish it under federal law, 45 CFR 180.50. Call to confirm it before booking. More
List price The hospital's full chargemaster price (“gross charge”) before any discount. Almost nobody pays it; the gap to the cash price shows what the self-pay discount is worth. More
Insurers pay The lowest and highest rates this hospital has agreed with insurance plans for the same item, from its price file. If the cash price is below what your plan pays and you have not met your deductible, paying cash can cost you less. More
Off list How much lower the cash price is than the list price.
No cash discount This line's cash price equals the hospital's full list price. Many hospitals still reduce bills for uninsured patients: ask the billing office for its self-pay discount in writing. More
Outpatient: lowest $5.89, median $26.00, highest $402.00 — a 68.3× difference within the same market.
As an inpatient, the same code is billed by 25 facilities here, median $26.00. 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 9 of 19 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 free T4 test is, what the price covers and why prices differ: Free T4 test explained.