Cortisol AM · high result
What does a high Cortisol AM mean?
Short answer
A high morning cortisol is most often stress, poor sleep, illness, pain, or a draw at the peak of the daily rhythm — not Cushing's syndrome. Oral contraceptives and pregnancy raise total cortisol by increasing its binding protein. A single high value is rarely diagnostic; if Cushing's is a concern, clinicians use late-night salivary cortisol, a dexamethasone suppression test or 24-hour urine cortisol.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Cortisol AM?
- age 18+, drawn 6–10 AM: 6.20 – 19.4 mcg/dL
Can reflect stress, certain medications, or, rarely, adrenal disorders.
Full reference table, citations and testing options: Cortisol AM biomarker page.
What are the common causes of high Cortisol AM?
- Acute stress, anxiety, poor sleep, illness, intense exercise
- Estrogen-containing contraceptives or pregnancy (raise binding protein)
- Alcohol use, depression, obesity
- Glucocorticoid medications (prednisone, hydrocortisone) cross-reacting in some assays
- Cushing's syndrome — adrenal, pituitary or ectopic ACTH (rare)
What symptoms go with high Cortisol AM?
- Often none
- Weight gain around the trunk and face, purple stretch marks, easy bruising, muscle weakness, high blood pressure, high glucose when Cushing's is present
What do clinicians usually check next?
- Repeat under calm conditions, off oral estrogen if possible
- If Cushing's is suspected: late-night salivary cortisol, 1 mg overnight dexamethasone suppression test, or 24-hour urine free cortisol
- Glucose, potassium and blood pressure review
Follow-up tests available at TestWell: Glucose ($14.99).
How do you recheck Cortisol AM?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| Men's Hormone Panel | Panel · 7 tests | $199.99 | No | 3–5 business days |
| Metabolism & Weight Loss Panel | Panel · 8 tests | $119.99 | Yes | 2–5 business days |
| Fitness & Performance Panel | Panel · 8 tests | $119.99 | Yes | 2–5 business days |
| Cortisol (AM) | Test | $26.99 | No | 2–4 business days |
Common questions
Does a high morning cortisol mean Cushing's?
Rarely. A morning serum cortisol is a poor screening test for Cushing's because the normal range is wide and stress raises it. The screening tests are the late-night salivary cortisol, the dexamethasone suppression test and 24-hour urine cortisol.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.