Free T4 test cost in Connecticut
In Connecticut, 16 hospitals publish a cash price for free T4 (free thyroxine) thyroid blood test: from $16.10 to $100.20, with a median of $55.55. The lowest price is at Day Kimball Healthcare (Putnam). The highest price is 6.2× the lowest.
Outpatient cash prices, one line per hospital — its lowest listed price for code 84439. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 23, 2026.
Hospitals in Connecticut, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Day Kimball Healthcare lowest Putnam · Putnam, CT T4 FREE, DIRECT DIALYSIS | $16.10 | $42.27 | Aug 1, 2026 source file |
| Connecticut Children's Hartford · Hartford, CT Free Th | $22.31 | $37.18 | — source file |
| Silver Hill Hospital New Canaan · New Canaan, CT Thyroxine (thyroid chemical), free | $36.00 | $36.00 | Sep 1, 2026 source file |
| John Dempsey Hospital of the University of Connecticut Farmington · Farmington, CT HC T4, FREE | $38.40 | $64.00 | Jul 1, 2026 source file |
| UConn Health, Waterbury Hospital Waterbury · Waterbury, CT Thyroxine Free | $45.73 | $91.45 | May 13, 2026 source file |
| Saint Marys Hospital Waterbury · Waterbury, CT HC Quest T4 (Thyroxine) Direct Dialysis | $48.40 | $88.00 | Mar 31, 2026 source file |
| Johnson Memorial Hospital Stafford Springs · Stafford Springs, CT HC T4 (Thyroxine) Free | $55.55 | $101.00 | Mar 31, 2026 source file |
| Mount Sinai Rehabilitation Hospital Hartford · Hartford, CT HC Warde T4 (Thyroxine) Free | $55.55 | $101.00 | Mar 31, 2026 source file |
| Saint Francis Hospital and Medical Center Hartford · Hartford, CT HC T4 (Thyroxine) Free | $55.55 | $101.00 | Mar 31, 2026 source file |
| The Charlotte Hungerford Hospital Torrington · Torrington, CT HC ASSAY OF FREE THYROXINE | $67.85 | $67.85 | — source file |
| Hartford Hospital Hartford · Hartford, CT HC ASSAY OF FREE THYROXINE | $75.15 | $75.15 | — source file |
| St Vincent's Medical Center Bridgeport · Bridgeport, CT HC ASSAY OF FREE THYROXINE | $78.00 | $78.00 | — source file |
| Gaylord Hospital Wallingford · Wallingford, CT T4 Thyroxine | $95.39 | $136.26 | Apr 21, 2026 source file |
| The William W Backus Hospital Norwich · Norwich, CT HC ASSAY OF FREE THYROXINE | $100.00 | $100.00 | — source file |
| The Hospital of Central Connecticut New Britain · New Britain, CT HC ASSAY OF FREE THYROXINE | $100.20 | $100.20 | — source file |
| Windham Community Memorial Hospital Willimantic · Willimantic, CT HC ASSAY OF FREE THYROXINE | $100.20 | $100.20 | — source file |
By metro area
Each metro page compares every listing, including prices for both sides of the body.
| Metro area | Hospitals | Lowest | Median |
|---|---|---|---|
| Hartford, CT | 4 | $22.31 | $55.55 |
| Waterbury, CT | 2 | $45.73 | $47.06 |
| Bridgeport, CT | 1 | $78.00 | $78.00 |
| Farmington, CT | 1 | $38.40 | $38.40 |
| New Britain, CT | 1 | $100.20 | $100.20 |
| New Canaan, CT | 1 | $36.00 | $36.00 |
| Norwich, CT | 1 | $100.00 | $100.00 |
| Putnam, CT | 1 | $16.10 | $16.10 |
| Stafford Springs, CT | 1 | $55.55 | $55.55 |
| Torrington, CT | 1 | $67.85 | $67.85 |
| Wallingford, CT | 1 | $95.39 | $95.39 |
| Willimantic, CT | 1 | $100.20 | $100.20 |
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.
Free T4 (free thyroxine) thyroid blood test in other states
- Alabama$74.96
- Alaska$68.40
- Arizona$17.45
- Arkansas$48.10
- California$68.12
- Colorado$49.00
- Delaware$157.92
- Florida$70.60
- Georgia$137.67
- Hawaii$44.40
- Idaho$40.00
- Illinois$82.08
- Indiana$72.25
- Iowa$61.18
- Kansas$109.75
- Kentucky$113.03
- Louisiana$37.66
- Maine$55.38
- Maryland$44.06
- Massachusetts$43.62
- Michigan$37.00
- Minnesota$65.27
- Mississippi$24.48
- Missouri$87.90
- Montana$51.20
- Nebraska$63.84
- Nevada$65.41
- New Hampshire$78.53
- New Jersey$10.37
- New Mexico$125.20
- New York$48.47
- North Carolina$78.40
- North Dakota$32.13
- Ohio$40.30
- Oklahoma$61.33
- Oregon$44.25
- Pennsylvania$63.90
- Puerto Rico$18.00
- Rhode Island$72.00
- South Carolina$105.00
- South Dakota$64.80
- Tennessee$27.50
- Texas$39.51
- Utah$84.43
- Vermont$114.00
- Virginia$57.00
- Washington$63.84
- West Virginia$45.75
- Wisconsin$70.85
- Wyoming$18.62
Median cash price across the state's hospitals.