Free T4 test cost in Boise City, ID — inpatient
In Boise City, ID, 4 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $37.05 to $40.05, with a median of $38.55. The lowest listed price is at Saint Alphonsus Medical Center - Nampa and 1 other hospital — $1.50 less than the median here. Across Idaho, the median is $40.00 at 9 hospitals.
Cash prices at 4 facilities across 2 cities for code 84439, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 31, 2026 and Mar 31, 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 Boise City, ID.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Saint Alphonsus Medical Center - Nampa lowest Nampa, ID HC T4 (Thyroxine) Free | $37.05 | $57.00 | $7.80–$58.90 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise lowest Boise, ID HC T4 (Thyroxine) Free | $37.05 | $57.00 | $7.80–$58.90 | 35% | Mar 31, 2026 source file |
| St Luke's Regional Medical Center, LTD Boise, ID | $40.05 | $40.05 | — | — | — source file |
| St Luke's Nampa Medical Center, LTD Nampa, ID | $40.05 | $40.05 | — | — | — source file |
| St Luke's Regional Medical Center, LTD Boise, ID | $69.00 | $69.00 | — | — | — source file |
| St Luke's Nampa Medical Center, LTD Nampa, ID | $69.00 | $69.00 | — | — | — source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID HC Quest T4 (Thyroxine) Direct Dialysis | $77.35 | $119.00 | $7.80–$119.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID HC Warde 3400847 T4 (Thyroxine) Free | $77.35 | $119.00 | $7.80–$119.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID HC Warde T4 (Thyroxine) Free | $77.35 | $119.00 | $7.80–$107.10 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID HC Quest T4 (Thyroxine) Direct Dialysis | $77.35 | $119.00 | $7.80–$107.10 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID HC Warde T4 (Thyroxine) Free | $77.35 | $119.00 | $7.80–$119.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID HC Warde 3400847 T4 (Thyroxine) Free | $77.35 | $119.00 | $7.80–$107.10 | 35% | Mar 31, 2026 source file |
Inpatient: lowest $37.05, median $38.55, highest $40.05 — a 1.1× difference within the same market.
As an outpatient, the same code is billed by 4 facilities here, median $38.53 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 2 of 2 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.