Total T4 test cost in Austin, TX
In Austin-Round Rock-San Marcos, TX, 29 hospitals list a cash price for total thyroxine (T4) blood test: from $7.56 to $675.00, with a median of $102.22. The lowest listed price is at The Hospital at Westlake Medical Center — $94.66 less than the median here. Across Texas, the median is $80.73 at 302 hospitals.
Cash prices at 29 facilities across 12 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 5, 2026 and Sep 1, 2026.
Lowest$7.56The Hospital at Westlake Medical Center
Median$102.22half pay less
Highest$675.00in this market
Difference89.3×highest vs lowest
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in Austin-Round Rock-San Marcos, TX.
median
Lowest $7.56Highest $675.00
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| The Hospital at Westlake Medical Center lowest Austin, TX · (512) 327-0000 T4 | $7.56 | $70.21 | $5.77–$49.15 | 89% | — source file |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 T-4 | $65.07 | $180.75 | $5.77–$81.34 | 64% | — source file |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 T-4 | $65.07 | $180.75 | $5.77–$81.34 | 64% | — source file |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T4 TOTAL | $77.58 | $215.50 | $5.77–$96.97 | 64% | — source file |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T4 TOTAL | $77.58 | $215.50 | $5.77–$96.97 | 64% | — source file |
| Ascension Seton Medical Center Austin Austin, TX · (512) 324-1000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Medical Center Austin Austin, TX · (512) 324-1000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 T4 TOTAL | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 T4 TOTAL | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Dell Seton Medical Center at the University of Tx Austin, TX · (512) 324-7000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Southwest Austin, TX · (512) 324-9000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Southwest Austin, TX · (512) 324-9000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Dell Seton Medical Center at the University of Tx Austin, TX · (512) 324-7000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Northwest Austin, TX · (512) 324-6000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Northwest Austin, TX · (512) 324-6000 T-4 | $80.73 | $224.25 | $5.77–$100.91 | 64% | — source file |
| Ascension Seton Edgar B Davis Luling, TX · (830) 875-7000 T4 TOTAL | $89.19 | $247.75 | $5.77–$111.49 | 64% | — source file |
| Ascension Seton Edgar B Davis Luling, TX · (830) 875-7000 T4 TOTAL | $89.19 | $247.75 | $5.77–$111.49 | 64% | — source file |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC THYROXIN BINDING-THYROXINE TOTAL | $101.84 | $152.00 | $6.87–$144.40 | 33% | Mar 5, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $5.77–$127.78 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $7.21–$110.74 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC THYROXINE - TOTAL | $102.22 | $170.37 | $10.07–$136.30 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $10.07–$136.30 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC THYROXINE - TOTAL | $102.22 | $170.37 | $5.77–$127.78 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC THYROXINE - TOTAL | $102.22 | $170.37 | $7.21–$110.74 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC THYROXINE - TOTAL | $102.22 | $170.37 | $5.77–$127.78 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $5.77–$127.78 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC THYROXINE - TOTAL | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC THYROXINE - TOTAL | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC THYROXINE - TOTAL | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE | $102.22 | $170.37 | $5.77–$153.33 | 40% | Jun 13, 2026 source file |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC T4 (TOTAL T4) | $103.18 | $154.00 | $6.87–$146.30 | 33% | Mar 5, 2026 source file |
| Ascension Seton Austin, TX T-4 | $126.53 | $180.75 | $5.77–$81.34 | 30% | — source file |
| Ascension Seton Austin, TX T-4 | $126.53 | $180.75 | $5.77–$81.34 | 30% | — source file |
| Ascension Cedar Park Cedar Park, TX · (512) 528-7000 THYROXINE T4,TOTAL | $130.84 | $363.44 | $5.77–$163.55 | 64% | — source file |
| Ascension Cedar Park Cedar Park, TX · (512) 528-7000 THYROXINE T4,TOTAL | $130.84 | $363.44 | $5.77–$163.55 | 64% | — source file |
| Ascension Seton Austin, TX T4 TOTAL | $156.98 | $224.25 | $5.77–$100.91 | 30% | — source file |
| Ascension Seton Austin, TX T4 TOTAL | $156.98 | $224.25 | $5.77–$100.91 | 30% | — source file |
| PAM Rehabilitation Hospital of Round Rock Round Rock, TX Total Thyroxine | $215.30 | $215.30 | $5.15–$193.77 | — | Aug 6, 2026 source file |
| Pam Specialty Hospital of Luling Luling, TX Total Thyroxine | $271.10 | $271.10 | $5.15–$243.99 | — | Aug 6, 2026 source file |
| St Davids Rehab Austin, TX THYROXINE T4 TOTAL | $334.00 | $334.00 | $16.70–$300.60 | — | Sep 1, 2026 source file |
| Heart Hosp of Austin at St. David's Round Rock Round Rock, TX THYROXINE T4 TOTAL | $334.00 | $334.00 | $16.70–$283.90 | — | Sep 1, 2026 source file |
| Heart Hosp of Austin Austin, TX THYROXINE T4 TOTAL | $334.00 | $334.00 | $16.70–$283.90 | — | Sep 1, 2026 source file |
| St. David's Georgetown Hospital Georgetown, TX · (512) 476-7111 THYROXINE T4 TOTAL | $334.00 | $334.00 | $16.70–$283.90 | — | Sep 1, 2026 source file |
| St. David's Medical Center Austin, TX · (512) 476-7111 THYROXINE T4 TOTAL | $334.00 | $334.00 | $225.12 | — | Sep 1, 2026 source file |
| St. David's Round Rock Medical Center Pflugerville, TX · (512) 341-1000 Thyroxine; total | $522.00 | $522.00 | $5.89–$6.87 | — | Sep 1, 2026 source file |
| St. David's Round Rock Medical Center Pflugerville, TX · (512) 341-1000 THYROXINE T4 TOTAL | $522.00 | $522.00 | $351.83 | — | Sep 1, 2026 source file |
| St. David's South Austin Medical Center Bastrop, TX · (512) 448-7107 Thyroxine; total | $616.00 | $616.00 | $5.89–$6.87 | — | Sep 1, 2026 source file |
| St. David's South Austin Medical Center Bastrop, TX · (512) 448-7107 THYROXINE T4 TOTAL | $616.00 | $616.00 | $415.18 | — | Sep 1, 2026 source file |
| St.davids Surgical Hospital Austin, TX THYROXINE T4 TOTAL | $675.00 | $675.00 | $448.88 | — | Sep 1, 2026 source file |
| St. David's North Austin Medical Center Austin, TX · (512) 901-1000 THYROXINE T4 TOTAL | $675.00 | $675.00 | $448.88 | — | Sep 1, 2026 source file |
Outpatient: lowest $7.56, median $102.22, highest $675.00 — a 89.3× difference within the same market.
As an inpatient, the same code is billed by 19 facilities here, median $102.22. 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 17 of 29 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.