Free T4 test cost in Detroit, MI
In Detroit-Warren-Dearborn, MI, 26 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test: from $12.45 to $402.00, with a median of $31.48. The lowest listed price is at Henry Ford Health West Bloomfield Hospital and 3 other hospitals — $19.03 less than the median here. Across Michigan, the median is $37.00 at 61 hospitals.
Cash prices at 26 facilities across 19 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 Dec 31, 2025 and Sep 2, 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 Detroit-Warren-Dearborn, MI.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Henry Ford Health West Bloomfield Hospital lowest West Bloomfield, MI · (248) 325-1000 HB LAB THYROXINE TOTAL FREE | $12.45 | $60.00 | $4.72–$31.71 | 79% | Jun 28, 2026 source file |
| Henry Ford Health Hospital lowest Detroit, MI · (313) 916-2600 HB LAB T4 FREE DIRECT DIALYSIS, SO | $12.45 | $11.55 | $4.72–$26.85 | -8% | Jun 28, 2026 source file |
| Henry Ford Health Hospital lowest Detroit, MI · (313) 916-2600 HB LAB THYROXINE TOTAL FREE | $12.45 | $60.00 | $7.36–$12.45 | 79% | Jun 28, 2026 source file |
| Henry Ford Wyandotte Hospital lowest Wyandotte, MI HB LAB THYROXINE TOTAL FREE | $12.45 | $60.00 | $7.36–$12.45 | 79% | Jun 28, 2026 source file |
| Henry Ford Wyandotte Hospital lowest Wyandotte, MI HB LAB T4 FREE DIRECT DIALYSIS, SO | $12.45 | $11.55 | $7.36–$11.55 | -8% | Jun 28, 2026 source file |
| Henry Ford Macomb Hospital lowest Clinton Twp, MI · (586) 263-2300 HB LAB THYROXINE TOTAL FREE | $12.45 | $60.00 | $4.72–$46.80 | 79% | Jun 28, 2026 source file |
| Henry Ford Macomb Hospital lowest Clinton Twp, MI · (586) 263-2300 HB LAB T4 FREE DIRECT DIALYSIS, SO | $12.45 | $11.55 | $4.72–$21.19 | -8% | Jun 28, 2026 source file |
| Henry Ford Health West Bloomfield Hospital lowest West Bloomfield, MI · (248) 325-1000 HB LAB T4 FREE DIRECT DIALYSIS, SO | $12.45 | $11.55 | $4.72–$26.85 | -8% | Jun 28, 2026 source file |
| Henry Ford Health Rochester, MI · (248) 652-5000 FREE T4 | $13.63 | $29.00 | $10.71–$11.64 | 53% | — source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 T4 FREE BY DIALYSIS | $18.85 | $37.70 | $4.93–$28.28 | 50% | Dec 31, 2025 source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 THYROXINE; FREE T4 | $21.85 | $39.02 | $12.30–$18.06 | 44% | — source file |
| Henry Ford Health East China Township, MI · (810) 329-7111 THYROXINE; FREE T4 | $21.85 | $39.02 | $12.30–$18.06 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 THYROXINE; FREE T4 | $24.08 | $43.00 | $12.30–$18.06 | 44% | — source file |
| Henry Ford Health Warren, MI · (586) 573-5000 THYROXINE; FREE T4 | $24.08 | $43.00 | $12.30–$18.06 | 44% | — source file |
| William Beaumont Hospital Troy, MI · (248) 964-8800 Hc Free T4 By Dialysis Mayo | $26.00 | $26.00 | — | — | — source file |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc Free T4 By Dialysis Mayo | $26.00 | $26.00 | — | — | — source file |
| William Beaumont Hospital Grosse Pointe, MI · (313) 473-1000 Hc Free T4 By Dialysis Mayo | $26.00 | $26.00 | — | — | — source file |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Free T4 By Dialysis Mayo | $26.00 | $26.00 | — | — | — source file |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Free T4 By Dialysis Mayo | $26.00 | $26.00 | — | — | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 THYROXINE FREE T4 | $36.96 | $66.00 | $7.35–$18.06 | 44% | — source file |
| Henry Ford Health Detroit, MI · (313) 343-4000 THYROXINE FREE T4 | $36.96 | $66.00 | $7.35–$18.06 | 44% | — source file |
| William Beaumont Hospital Troy, MI · (248) 964-8800 Hc Free T4 | $40.00 | $40.00 | — | — | — source file |
| Beaumont Hospital - Taylor Taylor, MI · (313) 295-5000 Hc Free T4 | $40.00 | $40.00 | — | — | — source file |
| William Beaumont Hospital Grosse Pointe, MI · (313) 473-1000 Hc Free T4 | $40.00 | $40.00 | — | — | — source file |
| Corewell Health Wayne Hospital Wayne, MI · (734) 467-4175 Hc Free T4 | $40.00 | $40.00 | — | — | — source file |
| Corewell Health Trenton Hospital Trenton, MI · (734) 671-3800 Hc Free T4 | $40.00 | $40.00 | — | — | — source file |
| Henry Ford Health Novi, MI THYROXINE, FREE (FT-4) | $42.56 | $76.00 | $6.08–$16.20 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 THYROXINE, FREE (FT-4) | $42.56 | $76.00 | $6.08–$16.20 | 44% | — source file |
| Henry Ford Health Southfield, MI · (248) 849-3000 THYROXINE, FREE (FT-4) | $42.56 | $76.00 | $6.08–$16.20 | 44% | — source file |
| Henry Ford Health Novi, MI THYROXINE, FREE (FT-4) | $42.56 | $76.00 | $6.08–$16.20 | 44% | — source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 FREE T4, DIRECT DIALYSIS | $48.20 | $96.40 | $4.93–$72.30 | 50% | Dec 31, 2025 source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 ASSAY OF FREE THYROXINE | $51.30 | $102.60 | $4.93–$52.12 | 50% | Dec 31, 2025 source file |
| McLaren Port Huron Port Huron, MI · (810) 987-5000 T4 Free Level | $53.10 | $106.20 | $4.93–$79.65 | 50% | Dec 31, 2025 source file |
| McLaren Lapeer Region Lapeer, MI · (810) 667-5500 T4 Free Level | $78.65 | $157.30 | $4.93–$82.43 | 50% | Dec 31, 2025 source file |
| McLaren Oakland Pontiac, MI · (248) 338-5000 T4 Free Level | $78.65 | $157.30 | $4.93–$121.48 | 50% | Dec 31, 2025 source file |
| McLaren Macomb Mount Clemens, MI · (586) 493-8000 T4 Free Level | $78.65 | $157.30 | $4.93–$97.13 | 50% | Dec 31, 2025 source file |
| VHS Sinai Grace Hospital Detroit, MI · (313) 966-3300 THYROXINE FREE | $78.75 | $105.00 | — | 25% | Apr 8, 2026 source file |
| Karmanos Cancer Center Detroit, MI · (800) 576-6266 THYROXINE, FREE | $103.95 | $207.90 | $4.93–$155.93 | 50% | Dec 31, 2025 source file |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 FREE THYROXINE INDEX | $134.25 | $179.00 | — | 25% | Apr 6, 2026 source file |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 FREE T4, DIRECT DIALYSIS | $140.25 | $187.00 | — | 25% | Apr 6, 2026 source file |
| VHS Detroit Receiving Hospital Detroit, MI · (313) 745-2941 THYROXINE FREE | $246.75 | $329.00 | — | 25% | Apr 7, 2026 source file |
| VHS Rehabilitation Institute of Michigan Detroit, MI THYROXINE FREE | $290.25 | $387.00 | — | 25% | Apr 8, 2026 source file |
| VHS Childrens Hospital of Michigan Detroit, MI · (313) 745-5437 THYROXINE FREE | $323.25 | $431.00 | — | 25% | Apr 6, 2026 source file |
| VHS Huron Valley-Sinai Hospital Commerce Charter Twp, MI · (248) 937-3370 THYROXINE FREE | $343.50 | $458.00 | $1.00–$12.30 | 25% | May 20, 2026 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 THYROXINE FREE | $402.00 | $536.00 | $1.00–$12.30 | 25% | Aug 20, 2026 source file |
| Harper University Hospital Detroit, MI · (313) 745-6211 THYROXINE FREE | $402.00 | $536.00 | $1.00–$12.30 | 25% | Sep 2, 2026 source file |
Outpatient: lowest $12.45, median $31.48, highest $402.00 — a 32.3× difference within the same market.
As an inpatient, the same code is billed by 14 facilities here, median $31.48. 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 8 of 17 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.