Free T4 test cost in Idaho
In Idaho, 33 hospitals publish a cash price for free T4 (free thyroxine) thyroid blood test: from $21.90 to $386.43, with a median of $49.00. The lowest price is at Treasure Valley Hospital (Boise). The highest price is 17.6× the lowest.
- The median here, $49.00, is 26% below the US median of $66.50.
- That is 5.4× Medicare's 2026 national rate for the same service ($9.02).
- Idaho ranks 12th of 51 states by median, cheapest first.
- 12 of 33 hospitals list a cash price equal to their full list price, with no self-pay discount.
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 Nov 7, 2026. See them on a map
Lowest$21.90Treasure Valley Hospital
Median$49.00half of hospitals charge less
Highest$386.43in Idaho
Lowest saves$27.10vs the median
Hospitals in Idaho, cheapest first
| Hospital | Cash price | List price | File date |
|---|---|---|---|
| Treasure Valley Hospital lowest Boise · Boise City, ID T4, Free | $21.90 | $44.00 | Sep 2, 2026 source file |
| Franklin County Medical Center Preston · Logan, UT-ID THYROXINE; FREE | $25.00 | $25.00 | Nov 12, 2025 source file |
| Idaho Falls Community Hospital Idaho Falls · Idaho Falls, ID THYROXINE (THYROID CHEMICAL); FREE | $36.00 | $36.00 | Mar 16, 2026 source file |
| Mountain View Hospital Idaho Falls · Idaho Falls, ID THYROXINE (THYROID CHEMICAL); FREE | $36.00 | $36.00 | Mar 16, 2026 source file |
| Madison Memorial Hospital Rexburg · Rexburg, ID THYROXINE (THYROID CHEMICAL); FREE | $36.75 | $49.00 | Mar 26, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa · Boise City, ID HC T4 (Thyroxine) Free | $37.05 | $57.00 | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise · Boise City, ID HC T4 (Thyroxine) Free | $37.05 | $57.00 | Mar 31, 2026 source file |
| St Luke's Magic Valley Regional Medical Center Twin Falls · Twin Falls, ID | $40.00 | $40.00 | Mar 25, 2026 source file |
| St Luke's McCall McCall · McCall, ID | $40.00 | $40.00 | Mar 25, 2026 source file |
| St Luke's Nampa Medical Center Nampa · Boise City, ID | $40.00 | $40.00 | Mar 25, 2026 source file |
| St Luke's Regional Medical Center Boise · Boise City, ID | $40.00 | $40.00 | Mar 25, 2026 source file |
| St Luke's Wood River Medical Center Ketchum · Hailey, ID | $40.00 | $40.00 | Mar 25, 2026 source file |
| Boundary Community Hospital Bonners Ferry · Bonners Ferry, ID Thyroxine (thyroid chemical), free | $43.20 | $54.00 | Jul 17, 2026 source file |
| Bonner General Hospital Sandpoint · Sandpoint, ID Thyroxine (thyroid chemical), free | $43.30 | $54.12 | Aug 1, 2026 source file |
| Clearwater Valley Hospital and Clinics Orofino · Orofino, ID Thyroxine (thyroid chemical), free | $45.00 | $60.00 | Jul 17, 2026 source file |
| St Marys Hospital Cottonwood · Cottonwood, ID Thyroxine (thyroid chemical), free | $45.00 | $60.00 | Jul 20, 2026 source file |
| Gritman Medical Center Moscow · Moscow, ID HC ASSAY OF FREE THYROXINE - T4 FREE | $49.00 | $49.00 | Aug 19, 2026 source file |
| Kootenai Health Coeur D'Alene · Coeur d'Alene, ID HC T4 (THYROXINE), FREE, S (REF LAB) | $56.25 | $75.00 | Mar 27, 2026 source file |
| Weiser Memorial Hospital Weiser · Weiser, ID T4 FREE DIRECT (LC) | $57.00 | $76.00 | Aug 18, 2026 source file |
| Teton Valley Health Care Driggs · Jackson, WY-ID Thyroxine (thyroid chemical), free | $66.40 | $83.00 | Jul 21, 2026 source file |
| Bingham Memorial Hospital Blackfoot · Blackfoot, ID Thyroxine (thyroid chemical), free | $67.20 | $96.00 | Oct 29, 2026 source file |
| Lost Rivers Medical Center Arco · Idaho Falls, ID Thyroxine (thyroid chemical), free | $68.80 | $86.00 | May 7, 2026 source file |
| Valor Health Emmett · Boise City, ID Thyroxine (thyroid chemical), free | $71.06 | $74.80 | Oct 28, 2026 source file |
| Steele Memorial Medical Center Salmon · Salmon, ID Thyroxine (thyroid chemical), free | $73.50 | $98.00 | Feb 26, 2026 source file |
| Bear Lake County Memorial Hospital Montpelier · Montpelier, ID T4-FREE REFERENCE LAB | $89.25 | $105.00 | May 28, 2026 source file |
| Shoshone Medical Center Kellogg · Kellogg, ID Free T4 by Dialysis/Mass Spec LC | $89.25 | $119.00 | Sep 29, 2026 source file |
| Caribou Medical Center Soda Springs · Soda Springs, ID Thyroxine (thyroid chemical), free | $89.60 | $128.00 | Nov 3, 2026 source file |
| Benewah Community Hospital Saint Maries · Saint Maries, ID Thyroxine (thyroid chemical), free | $93.60 | $104.00 | Oct 28, 2026 source file |
| Power County Hospital District American Falls · American Falls, ID T4 FREE (GN#) | $98.90 | $99.00 | Mar 31, 2026 source file |
| Northwest Specialty Hospital Post Falls · Coeur d'Alene, ID ASSAY OF FREE THYROXINE | $117.00 | $117.00 | Mar 5, 2026 source file |
| West Valley Medical Center Caldwell · Boise City, ID Thyroxine; free | $131.46 | $131.46 | Sep 1, 2026 source file |
| Portneuf Medical Center Pocatello · Pocatello, ID Thyroxine (thyroid chemical), free | $160.20 | $267.00 | Mar 31, 2026 source file |
| Eastern Idaho Regional Medical Center Idaho Falls · Idaho Falls, ID T4 FREE | $386.43 | $386.43 | Sep 1, 2026 source file |
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
File date When the hospital last updated its price file, as the file says itself. A dash means the file gives no date.
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
By metro area
Each metro page compares every listing, including prices for both sides of the body.
| Metro area | Hospitals | Lowest | Median |
|---|---|---|---|
| Boise City, ID | 7 | $21.90 | $40.00 |
| Idaho Falls, ID | 3 | $36.00 | $36.00 |
| Coeur d'Alene, ID | 2 | $56.25 | $86.62 |
| American Falls, ID | 1 | $98.90 | $98.90 |
| Bonners Ferry, ID | 1 | $43.20 | $43.20 |
| Blackfoot, ID | 1 | $67.20 | $67.20 |
| Cottonwood, ID | 1 | $45.00 | $45.00 |
| Hailey, ID | 1 | $40.00 | $40.00 |
| Idaho Falls, ID | 1 | $386.43 | $386.43 |
| Jackson, WY-ID | 1 | $66.40 | $66.40 |
| Kellogg, ID | 1 | $89.25 | $89.25 |
| Logan, UT-ID | 1 | $25.00 | $25.00 |
| McCall, ID | 1 | $40.00 | $40.00 |
| Montpelier, ID | 1 | $89.25 | $89.25 |
| Moscow, ID | 1 | $49.00 | $49.00 |
| Orofino, ID | 1 | $45.00 | $45.00 |
| Pocatello, ID | 1 | $160.20 | $160.20 |
| Rexburg, ID | 1 | $36.75 | $36.75 |
| Saint Maries, ID | 1 | $93.60 | $93.60 |
| Salmon, ID | 1 | $73.50 | $73.50 |
| Soda Springs, ID | 1 | $89.60 | $89.60 |
| Sandpoint, ID | 1 | $43.30 | $43.30 |
| Twin Falls, ID | 1 | $40.00 | $40.00 |
| Weiser, ID | 1 | $57.00 | $57.00 |
Market A metro area (as the Census Bureau defines it) or, outside metro areas, a town. Each links to every hospital price there.
Hospitals How many hospitals publish a cash price for this code here. Each hospital counts once, at its lowest outpatient cash price.
Lowest The lowest cash price among those hospitals.
Median The middle cash price: half of the hospitals charge less, half charge more. One price per hospital. More
What free T4 test is, what the price covers and why prices differ: Free T4 test explained.
Free T4 (free thyroxine) thyroid blood test in other states
- Alabama$60.96
- Alaska$137.40
- Arizona$53.86
- Arkansas$32.00
- California$68.12
- Colorado$104.02
- Connecticut$61.70
- Delaware$157.92
- District of Columbia$102.57, 3 hospitals
- Florida$84.03
- Georgia$75.49
- Hawaii$79.10
- Illinois$115.77
- Indiana$81.00
- Iowa$65.60
- Kansas$62.42
- Kentucky$74.62
- Louisiana$34.97
- Maine$57.72
- Maryland$43.12
- Massachusetts$66.00
- Michigan$31.00
- Minnesota$69.26
- Mississippi$35.42
- Missouri$77.18
- Montana$75.33
- Nebraska$90.88
- Nevada$101.04
- New Hampshire$98.25
- New Jersey$10.37
- New Mexico$123.20
- New York$48.00
- North Carolina$64.50
- North Dakota$62.63
- Ohio$42.49
- Oklahoma$61.33
- Oregon$45.75
- Pennsylvania$60.00
- Puerto Rico$44.50
- Rhode Island$72.00
- South Carolina$100.80
- South Dakota$95.00
- Tennessee$33.64
- Texas$76.83
- Utah$151.86
- Vermont$102.14
- Virginia$77.50
- Washington$69.16
- West Virginia$58.00
- Wisconsin$80.75
- Wyoming$77.28
Median cash price across the state's hospitals.