Total T4 test cost in Austin, TX — inpatient
In Austin-Round Rock-San Marcos, TX, 18 hospitals list a cash price for total thyroxine (T4) blood test as an inpatient: from $65.07 to $271.10, with a median of $102.22. The lowest listed price is at Ascension Seton Smithville — $37.15 less than the median here. Across Texas, the median is $79.50 at 282 hospitals.
Cash prices at 18 facilities across 10 cities for code 84436, as an inpatient (admitted to hospital) . Collected Sep 29, 2026; the hospital files themselves were last updated between Jan 1, 2026 and Aug 6, 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 Austin-Round Rock-San Marcos, TX.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list |
|---|---|---|---|---|
| Ascension Seton Smithville lowest Smithville, TX · (512) 237-3214 T-4 File of Jan 1, 2026 · source file | $65.07 | $180.75 | $5.77–$81.34 | 64% |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T4 TOTAL File of Jan 1, 2026 · source file | $77.58 | $215.50 | $5.77–$96.97 | 64% |
| Ascension Seton Medical Center Austin Austin, TX · (512) 324-1000 T-4 File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Ascension Seton Northwest Austin, TX · (512) 324-6000 T-4 File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Dell Seton Medical Center at the University of Tx Austin, TX · (512) 324-7000 T-4 File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Ascension Seton Hays Kyle, TX · (512) 324-5000 T-4 File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Ascension Seton Southwest Austin, TX · (512) 324-9000 T-4 File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Ascension Seton Smithville Smithville, TX · (512) 237-3214 T4 TOTAL File of Jan 1, 2026 · source file | $80.73 | $224.25 | $5.77–$100.91 | 64% |
| Ascension Seton Edgar B Davis Luling, TX · (830) 875-7000 T4 TOTAL File of Jan 1, 2026 · source file | $89.19 | $247.75 | $5.77–$111.49 | 64% |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC THYROXIN BINDING-THYROXINE TOTAL File of Mar 5, 2026 · source file | $101.84 | $152.00 | $60.80–$144.40 | 33% |
| Baylor Scott & White Medical Center - Taylor Taylor, TX · (512) 352-7611 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE+1 more line at this price File of Jun 12, 2026 · source file | $102.22 | $170.37 | $93.70–$136.30 | 40% |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX · (512) 509-0401 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE+1 more line at this price File of Jun 3, 2026 · source file | $102.22 | $170.37 | $93.70–$110.74 | 40% |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX · (512) 509-0401 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE+1 more line at this price File of Jun 13, 2026 · source file | $102.22 | $170.37 | $93.70–$153.33 | 40% |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX · (512) 654-6100 HC ASSAY OF TOTAL THYROXINE - THYROID PANEL, COMPREHENSIVE+1 more line at this price File of Jun 13, 2026 · source file | $102.22 | $170.37 | $93.70–$153.33 | 40% |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX · (512) 509-0401 HC THYROXINE - TOTAL+1 more line at this price File of Jun 13, 2026 · source file | $102.22 | $170.37 | $93.70–$153.33 | 40% |
| Baylor Scott & White Medical Center - Austin Austin, TX · (512) 654-2100 HC THYROXINE - TOTAL+1 more line at this price File of Jun 13, 2026 · source file | $102.22 | $170.37 | $93.70–$119.26 | 40% |
| Baylor Scott & White Medical Center - Buda Buda, TX · (737) 999-6200 HC THYROXINE - TOTAL+1 more line at this price File of Jun 13, 2026 · source file | $102.22 | $170.37 | $93.70–$119.26 | 40% |
| Texas Children's Hospital - Austin Austin, TX · (832) 824-1100 TC T4 (TOTAL T4) File of Mar 5, 2026 · source file | $103.18 | $154.00 | $61.60–$146.30 | 33% |
| Ascension Seton Austin, TX T-4 File of Jan 1, 2026 · source file | $126.53 | $180.75 | $5.77–$81.34 | 30% |
| Ascension Cedar Park Cedar Park, TX · (512) 528-7000 THYROXINE T4,TOTAL File of Jan 1, 2026 · source file | $130.84 | $363.44 | $5.77–$163.55 | 64% |
| Ascension Seton Austin, TX T4 TOTAL File of Jan 1, 2026 · source file | $156.98 | $224.25 | $5.77–$100.91 | 30% |
| Pam Specialty Hospital of Luling Luling, TX Total Thyroxine File of Aug 6, 2026 · source file | $271.10 | $271.10 | $189.77–$243.99 | — |
Inpatient: lowest $65.07, median $102.22, highest $271.10 — a 4.2× difference within the same market.
As an outpatient, the same code is billed by 27 facilities here, median $102.22 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 16 of 18 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.