Total T4 test cost in Boise City, ID
In Boise City, ID, 7 hospitals list a cash price for total thyroxine (T4) blood test: from $16.70 to $157.76, with a median of $31.00. The lowest listed price is at Treasure Valley Hospital — $14.30 less than the median here. Across Idaho, the median is $34.13 at 28 hospitals.
Cash prices at 7 facilities across 4 cities for code 84436, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 29, 2026; the hospital files themselves were last updated between Mar 31, 2026 and Sep 1, 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 |
|---|---|---|---|---|---|
| Treasure Valley Hospital lowest Boise, ID · (208) 373-5000 Total T4 Level | $16.70 | $195.25 | $6.87–$195.25 | 91% | — source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC T4 (Thyroxine) Total | $20.15 | $31.00 | $5.93–$36.50 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID · (208) 463-5000 HC T4 (Thyroxine) Total | $20.15 | $31.00 | $5.93–$36.50 | 35% | Mar 31, 2026 source file |
| St Luke's Regional Medical Center Boise, ID · (208) 381-2222 | $31.00 | $31.00 | — | — | — source file |
| St Luke's Nampa Medical Center Nampa, ID · (208) 505-2000 | $31.00 | $31.00 | — | — | — source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID · (208) 463-5000 HC Warde T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$94.50 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID · (208) 463-5000 HC Quest 7444 T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$94.50 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Medical Center - Nampa Nampa, ID · (208) 463-5000 HC Warde 3400847 T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$94.50 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC Quest 7444 T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$105.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC Warde T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$105.00 | 35% | Mar 31, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC Warde 3400847 T4 (Thyroxine) Total | $68.25 | $105.00 | $5.93–$105.00 | 35% | Mar 31, 2026 source file |
| Valor Health Emmett, ID · (208) 365-3561 Thyroxine (thyroid chemical), total | $83.60 | $88.00 | $6.05–$86.24 | 5% | Jun 12, 2026 source file |
| West Valley Medical Center Caldwell, ID · (208) 459-4641 Thyroxine; total | $157.76 | $157.76 | $6.87 | — | Sep 1, 2026 source file |
| West Valley Medical Center Caldwell, ID · (208) 459-4641 THYROXINE T4 TOTAL | $157.76 | $157.76 | $50.33–$149.87 | — | Sep 1, 2026 source file |
| West Valley Medical Center Caldwell, ID · (208) 459-4641 Thyroxine; total Other Outpatient | $157.76 | $157.76 | $6.87 | — | Sep 1, 2026 source file |
| Saint Alphonsus Regional Medical Center - Boise Boise, ID · (208) 367-2121 HC T4 (Thyroxine) Total | $373.75 | — | $6.11–$292.83 | — | Mar 31, 2026 source file |
Outpatient: lowest $16.70, median $31.00, highest $157.76 — a 9.4× difference within the same market.
As an inpatient, the same code is billed by 5 facilities here, median $20.15. 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 4 of 5 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 total T4 test measures all the thyroxine hormone in the blood, both bound and free. Most doctors now order free T4 (84439) instead, which is less affected by pregnancy and medicines.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.