Health Tests · Labcorp OnDemand
Cortisol Test, $89
$89 · no doctor visit needed
- Order online, walk into 2,000+ locations — no appointment
- Physician order included — no doctor visit required
- Results in your portal in days
Same certified lab your doctor uses. HSA/FSA accepted.
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Order online for $89, walk into any of 2,000+ Labcorp locations for a morning draw — no doctor's visit needed. Measures the cortisol in your blood in one draw, with results in a day — but only if the draw happens between 7 and 10 a.m., when cortisol peaks.
The short version
$89, one morning walk-in visit, results in a day
The Cortisol Test ($89) measures the cortisol in your blood — the stress hormone that peaks in the morning and falls through the day. Order online, walk in for a draw between 7 and 10 a.m., results in a day. A single morning number is a useful screen for adrenal problems — it is not a diagnosis, and it says nothing about the rest of the day's curve.
Shopping links on this page go directly to Labcorp OnDemand. We don't earn a commission on orders.
Price
| Test | Price | |
|---|---|---|
| Cortisol Test | $89 | Order now → |
Prices checked Nov 10, 2026. HSA/FSA eligible. Self-pay; insurance not billed.
What cortisol does — and why the draw has to be in the morning
Cortisol is a steroid hormone made by the adrenal glands. It helps the body respond to stress and is essential for metabolism, immune function, blood pressure, and sleep. The catch is that cortisol follows a daily rhythm: levels are highest in the morning and fall through the day, which is why this test has a collection window most tests do not — the blood sample should be collected between 7 a.m. and 10 a.m., when cortisol is typically at its peak. A draw at 3 p.m. measures a different point on the curve and is read against a different reference range, so the timing is part of the test, not a scheduling preference.
Who is actually at risk — and who should test
The test may benefit people who are curious about their stress-hormone levels, people experiencing symptoms of abnormal cortisol, and people who suspect an adrenal condition such as Addison’s disease (low cortisol) or Cushing’s syndrome (high cortisol). The symptom lists are long and overlap with many other conditions: high cortisol can bring unexplained weight gain around the midsection, a rounded face, high blood pressure, mood changes, muscle weakness, easy bruising, and fatigue; low cortisol can bring chronic fatigue, unexplained weight loss, dizziness on standing, nausea, salt cravings, and darkening of the skin. None of those symptoms points at cortisol on its own — the test earns its keep when symptoms or a clinician’s suspicion give a reason to look, not as a general wellness check.
What a single morning number can and cannot tell you
A morning cortisol result comes with reference ranges for morning and afternoon collection, so the number is read against the time it was drawn. A clearly high or low morning value points toward an adrenal or pituitary problem worth working up; a normal one is reassuring for that moment. What it cannot do: diagnose Cushing’s syndrome or Addison’s disease on its own — both need further testing with a clinician — or say anything about the rest of the day’s curve, since cortisol keeps falling after the morning peak. Levels are also affected by stress, pregnancy, exercise, hormone therapy, oral contraceptive pills, and long-term corticosteroid use, so the number needs that context. If your clinician wants the wider picture, the same draw can cover DHEA-S, ACTH, and aldosterone too — ask whether the single test or the broader panel fits the question you are asking.
Abnormal levels may suggest various conditions, but further evaluation by a healthcare provider is necessary. Concerning or persistent symptoms deserve a clinician visit, not just a test order.
High vs low: reading the symptoms honestly
The trap with cortisol symptoms is that both directions share fatigue, muscle weakness, mood changes, and difficulty concentrating — and every one of those has a dozen other causes, from poor sleep to thyroid problems to medication side effects. The symptoms that lean high are weight gain around the middle, a rounded face, high blood pressure, easy bruising, skin changes, acne, and increased thirst and frequent urination; the ones that lean low are unexplained weight loss, dizziness when standing, nausea and abdominal pain, salt cravings, darkening of the skin, and low blood pressure and blood sugar. Symptoms alone cannot diagnose a cortisol problem and a test alone cannot explain them — the honest use of this test is narrow: confirm or rule out an abnormal morning level when symptoms or risk factors point that way, then take the result to a clinician.
How walk-in cortisol testing works
You order the test online, then visit a patient service center for a standard venous blood draw — no doctor’s order, no appointment, and no insurance needed. The one rule that matters: arrive between 7 a.m. and 10 a.m. Results typically post to a secure portal 1 day after your sample arrives at the lab. HSA/FSA accepted. If you take a supplement containing biotin (vitamin B7, common in hair/skin/nail products), wait at least 72 hours from your last dose before the draw — biotin can interfere with the assay. Labcorp is currently running 20% off with promo code MARKER20 — check the product page for the current price before ordering.
Common questions
Do I need to fast before a cortisol test?
No fasting requirement is listed for this test — the prep rule that matters is timing: the draw must happen between 7 and 10 a.m., when cortisol is at its morning peak. A later draw is read against a different reference range, so book the morning slot.
Why must the draw be in the morning?
Cortisol follows a daily rhythm, highest in the morning and declining through the day. A morning draw is measured against the morning reference range; the result comes with morning and afternoon ranges so it is read against the time it was collected.
What is a normal cortisol level?
Reference ranges vary by lab and by time of day, so read the morning and afternoon ranges printed on your own report — and treat a borderline result as a reason for follow-up with your doctor, not a verdict. A single morning number is a screen, not a full picture of the daily curve.
Can one cortisol test diagnose Cushing’s or Addison’s disease?
No. The test shows whether a morning cortisol level is high, low, or in range; Cushing’s syndrome and Addison’s disease both need further workup with a clinician. The cortisol result is the starting point, not the diagnosis.
I take a biotin supplement — will it skew the result?
Yes. Biotin can interfere with the assay, so wait at least 72 hours from your last dose before the blood draw. Tell your doctor what you take and when you last took it — do not stop a prescribed supplement just to test without asking first.
Ready to order?
Get your cortisol number this week
Order the Cortisol Test for $89 and walk in for a morning draw this week — no doctor visit required.