The $19–39 TSH-only test is what most people order first — and for anyone with real thyroid symptoms, it is the one most likely to produce a falsely reassuring “normal.” Here is which thyroid panel to actually order, where to get it at a fair price, and what each marker tells you.
Updated: July 24, 2026 • Prices reflect ranges verified in our thyroid panel cost survey, subject to change
Start Here
Before picking a provider, pick the right panel. The single most common thyroid-testing mistake is not where people order — it is ordering TSH alone when they have symptoms.
TSH (thyroid stimulating hormone) is the pituitary gland's signal to the thyroid — a high TSH usually means the thyroid is underperforming, and a low TSH usually means it is overactive. It is an excellent screening test for overt disease. But it has blind spots that matter when you are investigating symptoms.
Subclinical hypothyroidism — normal TSH with low Free T4 — affects an estimated 4–10% of adults and is missed entirely by TSH-only screening. Early autoimmune thyroiditis (Hashimoto's) often shows elevated TPO antibodies with a normal TSH for years before the gland fails. And T4-to-T3 conversion problems can leave Free T4 in range while Free T3 sits low — a pattern invisible to a TSH-only order.
That is why the answer to “what is the best thyroid panel?” depends on why you are testing:
Watch for incomplete “thyroid panels.” Some services sell a bundle labeled “thyroid panel” that includes TSH and Free T4 but skips Free T3 and TPO antibodies. Without TPO, you miss early Hashimoto's. Without Free T3, you miss conversion issues. Our thyroid testing guide explains how to read each marker once results arrive.
Our Picks
All in-lab options below draw at Quest Diagnostics or Labcorp — the same CLIA-certified labs a physician's order goes to. What differs is price, panel composition, and what happens after results land.
The complete symptom-workup panel at the lowest price among the services we have ordered from. RequestATest's TSH-only test ($29–39) is also consistently at or near the bottom of the market if you just want a baseline. Results in 1–3 business days, 3,600+ draw locations, and the panel includes TPO antibodies — so autoimmune thyroiditis is not missed. The tradeoff: you get raw numbers and no built-in clinician, so plan to bring results to your own doctor if anything reads off.
HealthLabs runs $10–20 higher per panel than RequestATest for equivalent work (TSH only: $39–49; full panel: $89–129), but it is the one direct-pay service offering an optional physician consultation ($49–79) to review your results. For a first-time thyroid workup, that changes the math: a confusing TPO result at RequestATest means booking a separate telehealth visit, while HealthLabs has the clinician a click away. It also has 4,500+ draw locations and takes HSA/FSA cards.
Honest note: we have not run our full ordering process through Ulta Lab Tests, and we have no commercial relationship with them — but in our price survey their full thyroid panel sticker was among the cheapest we found, drawing at Quest like everyone else. If your only goal is the lowest possible cash price and you are comfortable with a barebones experience, they are worth a look. If you want the service we have actually tested end-to-end, RequestATest's $89–109 panel is the safer recommendation.
If you want the wider thyroid picture in one draw — including Reverse T3 for troubleshooting conversion issues — Walk-In Lab's expanded panel is the most complete bundle in our survey. Reverse T3 is not part of standard screening and most endocrinologists consider it an optional add-on, but it can be informative if Free T4 is normal and symptoms persist. We have not ordered through Walk-In Lab ourselves, so this pick is based on panel composition and surveyed pricing rather than hands-on testing.
Not sure which panel your situation calls for? Start with TSH + Free T4 + Free T3 + TPO antibodies — it answers the question a TSH-only test can leave open, for $50–90 more.
See Panel Options at RequestATestQuest & Labcorp network · Results in 1–3 business days
Side by Side
| Provider | Best-Fit Panel | Price | Collection | Turnaround | Doctor Consult |
|---|---|---|---|---|---|
| RequestATest Best for Most | TSH + Free T4 + Free T3 + TPO | $89–109 | In-lab (Quest/Labcorp) | 1–3 days | No |
| HealthLabs Best w/ Consult | TSH + Free T4 + Free T3 + TPO | $89–129 | In-lab (Quest) | 1–3 days | Optional ($49–79) |
| Ulta Lab Tests Survey only | Full thyroid panel | $79–99 | In-lab (Quest) | 1–3 days | No |
| Walk-In Lab Survey only | Full panel + Reverse T3 | $129–179 | In-lab (Quest/Labcorp) | 2–5 days | No |
Prices reflect ranges from our July 2026 survey and periodic promotions; some services add a $6–10 draw fee at the collection site. Full per-provider pricing in the thyroid panel cost comparison.
What Each Marker Means
Once results arrive, here is what each marker tells you — and why ordering all four together beats cherry-picking individual tests.
The pituitary's signal to the thyroid. High TSH suggests the thyroid is underperforming; low TSH suggests overactivity. Reference range is typically 0.4–4.5 mIU/L, though optimal ranges are debated. TSH alone catches overt disease but misses the patterns below.
The storage hormone — what the thyroid produces and what levothyroxine replaces. Low Free T4 with normal TSH is subclinical hypothyroidism, a common cause of persistent symptoms with a “normal” TSH screen.
The active hormone your cells actually use. Some people convert T4 to T3 poorly, leaving Free T4 in range while Free T3 sits low. This pattern is invisible without ordering Free T3.
Marks autoimmune thyroiditis (Hashimoto's). Can be elevated for years before TSH rises. If you have symptoms and a normal TSH, elevated TPO is often the earliest actionable finding.
For the broader hormone context — how thyroid interacts with cortisol, sex hormones, and metabolic markers — see our hormone testing guide.
Frequently Asked Questions
For most people with symptoms: TSH + Free T4 + Free T3 + TPO antibodies ($89–129 direct-pay). It closes the false-reassurance gap a TSH-only test leaves open. Symptom-free and just curious? TSH-only ($19–39) is a legitimate baseline — upgrade later if symptoms appear.
For asymptomatic routine screening, yes. For anyone investigating fatigue, weight changes, hair thinning, cold sensitivity, or brain fog, no — subclinical hypothyroidism and early Hashimoto's are routinely missed by TSH alone.
Not strictly. But stop high-dose biotin supplements 48–72 hours before the draw — biotin can interfere with some thyroid immunoassays and produce misleading results. Morning draws help if you plan to retest for trend tracking.
Autoimmune thyroiditis — most commonly Hashimoto's disease. TPO can be elevated years before TSH rises, making it the earliest marker of autoimmune thyroid damage. Any panel sold without TPO is incomplete for symptom workups.
$89–129 at RequestATest and HealthLabs for TSH + Free T4 + Free T3 + TPO. TSH-only runs $19–39. The same work through a doctor's office often bills $150–400 to uninsured patients before visit fees. Full breakdown in our thyroid panel cost guide.
The best thyroid panel is the one that cannot mislead you: TSH + Free T4 + Free T3 + TPO antibodies, drawn at the same CLIA-certified labs your doctor uses. Both of our top picks list exact prices upfront — compare and order in a few minutes.
Check Panel Prices at RequestATest →Prefer a doctor's walkthrough of your results? HealthLabs thyroid panels include an optional physician consult.
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