Free T4 test cost in Colorado
In Colorado, 17 hospitals publish a cash price for free T4 (free thyroxine) thyroid blood test: from $6.36 to $335.95, with a median of $49.00. The lowest price is at Banner Fort Collins Medical Center (Fort Collins). The highest price is 52.8× 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 Colorado, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Banner Fort Collins Medical Center lowest Fort Collins · Fort Collins-Loveland, CO LAB THYROXINE T4 FREE | $6.36 | $28.00 | Mar 2, 2026 source file |
| Banner North Colorado Medical Center Greeley · Greeley, CO LAB THYROXINE T4 FREE | $6.44 | $28.00 | Mar 2, 2026 source file |
| Banner North Colorado Medical Center - Loveland Campus Loveland · Loveland, CO LAB THYROXINE T4 FREE | $6.44 | $28.00 | Mar 2, 2026 source file |
| Sterling Regional Medical Center Sterling · Sterling, CO LAB THYROXINE T4 FREE | $9.24 | $28.00 | Mar 2, 2026 source file |
| Community Hospital Grand Junction · Grand Junction, CO ASSAY OF FREE THYROXINE | $13.44 | $24.00 | — source file |
| East Morgan County Hospital Brush · Fort Morgan, CO LAB THYROXINE T4 FREE | $17.25 | $28.00 | Feb 12, 2026 source file |
| Denver Health and Hospital Authority Denver · Denver-Aurora-Centennial, CO HC THYROXINE FREE STANDOUT | $18.41 | $52.58 | Apr 30, 2026 source file |
| Childrens Hospital Colorado Aurora · Denver-Aurora-Centennial, CO HB=CSHB T4 FREE BY DIALYSIS | $48.10 | $74.00 | Apr 17, 2026 source file |
| National Jewish Health Denver · Denver-Aurora-Centennial, CO HC FREE THYROXINE | $49.00 | $70.00 | — source file |
| Denver Rehabilitation Hospital Denver · Denver-Aurora-Centennial, CO Assay of thyroid (t4) | $103.02 | $103.02 | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Inverness Englewood · Denver-Aurora-Centennial, CO Assay of thyroid (t4) | $103.02 | $103.02 | Apr 1, 2026 source file |
| AdventHealth Avista Louisville · Boulder, CO HC T4 FREE REFLEX FROM TSH CASCADE | $158.93 | $158.93 | Apr 1, 2026 source file |
| AdventHealth Castle Rock Castle Rock · Denver-Aurora-Centennial, CO HC T4 FREE BY DIALYSIS - ARUP | $158.93 | $158.93 | Apr 1, 2026 source file |
| AdventHealth Littleton Littleton · Denver-Aurora-Centennial, CO HC T4 FREE | $158.93 | $158.93 | Apr 1, 2026 source file |
| AdventHealth Parker Parker · Denver-Aurora-Centennial, CO HC T4 FREE BY DIALYSIS - ARUP | $158.93 | $158.93 | Apr 1, 2026 source file |
| AdventHealth Porter Denver · Denver-Aurora-Centennial, CO HC T4 FREE REFLEX FROM TSH CASCADE | $158.93 | $158.93 | Apr 1, 2026 source file |
| Craig Hospital Englewood · Denver-Aurora-Centennial, CO HC THYROXINE FREE (FT4) | $335.95 | $881.75 | Jun 25, 2026 source file |
By metro area
Each metro page compares every listing, including prices for both sides of the body.
| Metro area | Hospitals | Lowest | Median |
|---|---|---|---|
| Denver-Aurora-Centennial, CO | 10 | $18.41 | $130.98 |
| Boulder, CO | 1 | $158.93 | $158.93 |
| Fort Collins-Loveland, CO | 1 | $6.36 | $6.36 |
| Fort Morgan, CO | 1 | $17.25 | $17.25 |
| Grand Junction, CO | 1 | $13.44 | $13.44 |
| Greeley, CO | 1 | $6.44 | $6.44 |
| Loveland, CO | 1 | $6.44 | $6.44 |
| Sterling, CO | 1 | $9.24 | $9.24 |
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
- Connecticut$55.55
- 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.