Thyroid Panel with TSH

No. This is the classic fixed panel Quest and Labcorp have offered for decades — it reports Total T4 (all thyroxine, bound and unbound) plus T3 Uptake, and calculates a Free T4 Index (FTI) from those two values to estimate free hormone activity. If you want directly measured free hormones, order TSH + Free T4 ($27.99) or Free T3 instead — modern free-hormone assays are separate tests, not part of this panel.

TSH alone catches most primary thyroid disease, but adding Total T4, T3 Uptake, and the calculated FTI helps confirm whether an abnormal TSH reflects true hormone excess or deficiency, and flags binding-protein effects (pregnancy, estrogen therapy) that can distort Total T4 readings.

TestWell charges $36.99 ($46.99 at Labcorp draw sites) — vs $65 for the same panel at Quest Direct and $100-$250 at hospital outpatient labs.

No fasting required, but if you take levothyroxine, draw before your morning dose for consistency.

84443 (TSH) + 84436 (Total T4) + 84479 (T3 Uptake). The Free T4 Index is calculated from Total T4 and T3 Uptake, so it carries no separate CPT code. HSA/FSA eligible as a bundle.

If you have a family history of autoimmune thyroid disease or symptoms despite normal TSH, add TPO Antibodies to screen for Hashimoto's — the most common cause of hypothyroidism in the US.

Ordered directly, the closest equivalent lists at $149.00 at Quest Health (Quest Diagnostics' own site) and $89.00 at Labcorp OnDemand (prices checked September 2026). TestWell orders the same test at the same Quest or Labcorp patient service centers for $36.99 — $42.99 all-in with the $6 per-order lab processing fee — paid out of pocket at checkout with no insurance, doctor's visit or draw fee; HSA and FSA cards are accepted.

Thyroid Panel with TSH test results are typically ready in 1–3 business days after your draw at Quest or Labcorp. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation.

Biotin supplements, ashwagandha and thyroid-support supplements, levothyroxine timing and time of day can change a Thyroid Panel with TSH test result without anything being wrong. Biotin supplements can falsely lower TSH and can falsely raise Total T4 — stop biotin ≥72 hours before the draw. Ashwagandha and thyroid-support supplements can lower TSH and can raise Total T4 — note the supplement on a thyroid panel; a clinician may repeat TSH after a planned pause. Levothyroxine timing can raise Total T4 — draw before the daily dose, then take it. Time of day can shift TSH — keep the draw time consistent between tests. Each factor is covered on our physician-reviewed "Before your test" pages; when one applies, the fix is usually to remove it and retest.

Order the Thyroid Panel with TSH test online from TestWell for $36.99 (plus a $6 per-order lab processing fee) — no doctor's visit, referral or insurance needed. A licensed physician authorizes the order, then you walk into any Quest or Labcorp patient service center near you for the draw (the lab locator on our site lists the closest ones by ZIP code), and results arrive in 1–3 business days.

The Thyroid Panel with TSH test is Quest Diagnostics test code 7444, Labcorp test number 000620 (CPT 84443, 84436, 84479). TestWell orders it under those codes for $36.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 1–3 business days. Codes verified against the labs' catalogs in 2026.