Free T4 test cost in Phoenix, AZ — inpatient
In Phoenix-Mesa-Chandler, AZ, 27 hospitals list a cash price for free T4 (free thyroxine) thyroid blood test as an inpatient: from $7.46 to $272.00, with a median of $31.26. The lowest listed price is at Banner Casa Grande Medical Center — $23.80 less than the median here. Across Arizona, the median is $17.45 at 36 hospitals.
Cash prices at 27 facilities across 14 cities for code 84439, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 2, 2026 and May 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 Phoenix-Mesa-Chandler, AZ.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Banner Casa Grande Medical Center lowest Casa Grande, AZ · (520) 381-6300 LAB THYROXINE T4 FREE NS | $7.46 | $66.00 | $29.70–$49.50 | 89% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ · (480) 321-2000 LAB THYROXINE T4 FREE NS | $8.38 | $66.00 | $29.70–$49.50 | 87% | Mar 2, 2026 source file |
| Banner Desert Medical Center Mesa, AZ · (480) 412-3000 LAB THYROXINE T4 FREE NS | $9.90 | $66.00 | $29.70–$49.50 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ · (623) 832-4000 LAB THYROXINE T4 FREE NS | $9.97 | $66.00 | $29.70–$52.80 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ · (623) 524-4000 LAB THYROXINE T4 FREE NS | $10.16 | $66.00 | $29.70–$52.80 | 85% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ · (602) 865-4470 LAB THYROXINE T4 FREE NS | $10.43 | $66.00 | $29.70–$49.50 | 84% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ · (623) 327-4000 LAB THYROXINE T4 FREE NS | $10.43 | $66.00 | $29.70–$49.50 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ · (602) 839-2000 LAB THYROXINE T4 FREE NS | $10.56 | $66.00 | $29.70–$49.50 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ · (480) 543-2000 LAB THYROXINE T4 FREE NS | $10.96 | $66.00 | $29.70–$49.50 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ · (480) 394-4000 LAB THYROXINE T4 FREE NS | $11.42 | $66.00 | $29.70–$49.50 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ · (480) 733-3300 LAB THYROXINE T4 FREE NS | $12.54 | $66.00 | $29.70–$49.50 | 81% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ · (480) 256-7000 LAB THYROXINE T4 FREE NS | $12.94 | $66.00 | $29.70–$49.50 | 80% | Mar 2, 2026 source file |
| Banner Heart Hospital Mesa, AZ · (480) 854-5050 LAB THYROXINE T4 FREE | $17.81 | $212.00 | $95.40–$159.00 | 92% | Mar 2, 2026 source file |
| Banner Casa Grande Medical Center Casa Grande, AZ · (520) 381-6300 LAB THYROXINE T4 FREE | $23.96 | $212.00 | $95.40–$159.00 | 89% | Mar 2, 2026 source file |
| Banner Baywood Medical Center Mesa, AZ · (480) 321-2000 LAB THYROXINE T4 FREE | $26.92 | $212.00 | $95.40–$159.00 | 87% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ T4 FREE (THYROXINE) | $31.26 | $31.26 | $31.26 | — | Mar 16, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ T4 FREE (THYROXINE) | $31.26 | $31.26 | $31.26 | — | Mar 31, 2026 source file |
| Banner Desert Medical Center Mesa, AZ · (480) 412-3000 LAB THYROXINE T4 FREE | $31.80 | $212.00 | $95.40–$159.00 | 85% | Mar 2, 2026 source file |
| Banner Boswell Medical Center Sun City, AZ · (623) 832-4000 LAB THYROXINE T4 FREE | $32.01 | $212.00 | $95.40–$169.60 | 85% | Mar 2, 2026 source file |
| Banner Del E Webb Medical Center Sun City West, AZ · (623) 524-4000 LAB THYROXINE T4 FREE | $32.65 | $212.00 | $95.40–$169.60 | 85% | Mar 2, 2026 source file |
| Banner Thunderbird Medical Center Glendale, AZ · (602) 865-4470 LAB THYROXINE T4 FREE | $33.50 | $212.00 | $95.40–$159.00 | 84% | Mar 2, 2026 source file |
| Banner Estrella Medical Center Phoenix, AZ · (623) 327-4000 LAB THYROXINE T4 FREE | $33.50 | $212.00 | $95.40–$159.00 | 84% | Mar 2, 2026 source file |
| Banner University Medical Center Phoenix Phoenix, AZ · (602) 839-2000 LAB THYROXINE T4 FREE | $33.92 | $212.00 | $95.40–$159.00 | 84% | Mar 2, 2026 source file |
| Banner Gateway Medical Center Gilbert, AZ · (480) 543-2000 LAB THYROXINE T4 FREE | $35.19 | $212.00 | $95.40–$159.00 | 83% | May 1, 2026 source file |
| Banner Ironwood Medical Center San Tan Valley, AZ · (480) 394-4000 LAB THYROXINE T4 FREE | $36.68 | $212.00 | $95.40–$159.00 | 83% | Mar 2, 2026 source file |
| Banner Goldfield Medical Center Apache Junction, AZ · (480) 733-3300 LAB THYROXINE T4 FREE | $40.28 | $212.00 | $95.40–$159.00 | 81% | Mar 2, 2026 source file |
| Banner Ocotillo Medical Center Chandler, AZ · (480) 256-7000 LAB THYROXINE T4 FREE | $41.55 | $212.00 | $95.40–$159.00 | 80% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ THYROXINE FREE (FREE T4) | $48.75 | $48.75 | $48.75 | — | Mar 16, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ THYROXINE FREE (FREE T4) | $48.75 | $48.75 | $48.75 | — | Mar 31, 2026 source file |
| Reunion Rehabilitation Hospital Peoria Peoria, AZ Assay of thyroid (t4) | $103.02 | $103.02 | — | — | Apr 1, 2026 source file |
| Reunion Rehabilitation Hospital Phoenix Phoenix, AZ Assay of thyroid (t4) | $103.02 | $103.02 | — | — | Apr 1, 2026 source file |
| Banner Behavioral Health Hospital Scottsdale, AZ · (480) 448-7500 LAB THYROXINE T4 FREE | $124.21 | $212.00 | $95.40–$163.24 | 41% | Mar 2, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Gilbert, AZ THYROID FUNCTION PANEL | $176.40 | $176.40 | $176.40 | — | Mar 16, 2026 source file |
| Dignity Health East Valley Rehabilitation Hospital Chandler, AZ THYROID FUNCTION PANEL | $176.40 | $176.40 | $176.40 | — | Mar 31, 2026 source file |
| HonorHealth Florence Medical Center Florence, AZ Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Deer Valley Medical Center Phoenix, AZ · (623) 879-6100 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Sonoran Crossing Medical Center Phoenix, AZ · (480) 882-4327 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Tempe Medical Center Tempe, AZ Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Scottsdale Shea Medical Center Scottsdale, AZ · (480) 323-3000 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Scottsdale Osborn Medical Center Scottsdale, AZ · (480) 882-4004 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth John C. Lincoln Medical Center Phoenix, AZ · (602) 943-2381 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Four Peaks Medical Center Mesa, AZ · (480) 358-6100 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
| HonorHealth Scottsdale Thompson Peak Med Center Scottsdale, AZ · (480) 324-7001 Hc Thyroxine; Free | $272.00 | $272.00 | — | — | Apr 1, 2026 source file |
Inpatient: lowest $7.46, median $31.26, highest $272.00 — a 36.5× difference within the same market.
As an outpatient, the same code is billed by 26 facilities here, median $15.38 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 14 of 16 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 13 it is 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.
1 row held back from this comparison
It is priced below $1 or below a tenth of the national median for code 84439 ($60.00). Such a line is almost always a physician's fee billed separately, an assistant's share or a placeholder — a real charge, but not the price of the procedure itself.
| Banner Heart Hospital Mesa, AZLAB THYROXINE T4 FREE NS | $5.54 | file |