Free T3 test cost in Austin, TX
In Austin-Round Rock-San Marcos, TX, 13 hospitals list a cash price for Free T3 thyroid hormone test: from $55.08 to $322.53, with a median of $152.02. The lowest listed price is at Ascension Seton — $96.94 less than the median here. Across Texas, the median is $139.50 at 96 hospitals.
Cash prices at 13 facilities across 10 cities for code 84481, as an outpatient — the setting a self-pay patient normally buys. Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 5, 2026 and Jun 13, 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 | File date |
|---|---|---|---|---|---|
| Ascension Seton lowest Luling, TX T3 FREE | $55.08 | $153.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton lowest Luling, TX T3 FREE | $55.08 | $153.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Kyle, TX T3 FREE | $57.06 | $158.50 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Kyle, TX T3 FREE | $57.06 | $158.50 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Smithville, TX T3 FREE | $59.31 | $164.75 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Smithville, TX T3 FREE | $59.31 | $164.75 | $5.43–$125.95 | 64% | — source file |
| Texas Children's Hospital - Austin Austin, TX TC FREE T3 | $94.47 | $141.00 | $16.94–$133.95 | 33% | Mar 5, 2026 source file |
| Ascension Seton Kyle, TX FREE ASSAY (FT-3) | $95.40 | $265.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $95.40 | $265.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $95.40 | $265.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Kyle, TX FREE ASSAY (FT-3) | $95.40 | $265.00 | $5.43–$125.95 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $106.11 | $294.75 | $5.43–$132.64 | 64% | — source file |
| Ascension Seton Austin, TX T3 FREE | $115.33 | $164.75 | $5.43–$125.95 | 30% | — source file |
| Ascension Seton Austin, TX T3 FREE | $115.33 | $164.75 | $5.43–$125.95 | 30% | — source file |
| Baylor Scott & White Medical Center - Buda Buda, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$190.03 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Emergency Medical Center - Cedar Park Cedar Park, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $17.79–$164.69 | 40% | Jun 3, 2026 source file |
| Baylor Scott & White Medical Center - Austin Austin, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$190.03 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Pflugerville Pflugerville, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$228.03 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Taylor Taylor, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$202.70 | 40% | Jun 12, 2026 source file |
| Baylor Scott & White Medical Center - Round Rock Round Rock, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$228.03 | 40% | Jun 13, 2026 source file |
| Baylor Scott & White Medical Center - Lakeway Lakeway, TX HC TRIIODOTHYRONINE T3 - FREE | $152.02 | $253.37 | $12.00–$228.03 | 40% | Jun 13, 2026 source file |
| Ascension Seton Smithville, TX FREE ASSAY (FT-3) | $226.08 | $628.00 | $5.43–$282.60 | 64% | — source file |
| Ascension Seton Smithville, TX FREE ASSAY (FT-3) | $226.08 | $628.00 | $5.43–$282.60 | 64% | — source file |
| Ascension Cedar Park Cedar Park, TX T3,FREE | $322.53 | $895.93 | $5.43–$403.17 | 64% | — source file |
| Ascension Cedar Park Cedar Park, TX T3,FREE | $322.53 | $895.93 | $5.43–$403.17 | 64% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $439.60 | $628.00 | $5.43–$282.60 | 30% | — source file |
| Ascension Seton Austin, TX FREE ASSAY (FT-3) | $439.60 | $628.00 | $5.43–$282.60 | 30% | — source file |
Outpatient: lowest $55.08, median $152.02, highest $322.53 — a 5.9× difference within the same market.
As an inpatient, the same code is billed by 13 facilities here, median $152.02. 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 13 of 13 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
Free T3 is the active thyroid hormone not bound to proteins. It is usually checked after TSH (84443) and free T4 (84439), mainly when an overactive thyroid is suspected.
What the price covers
The price usually covers running the test. The blood draw (36415) is often billed as a separate line.