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Serum serotonin level - Results

Alternative Names

5-HT level; 5-hydroxytryptamine level; Serotonin test

Normal Values:

The normal range is 101-283 nanograms per milliliter (ng/mL).

Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

What abnormal results mean:

Higher-than-normal levels may indicate carcinoid syndrome.

Blood test

Reviewed last on: 3/14/2009
Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Bluth MH, Hardin RE, Tenner S, Zenilman ME, Threatte GA. Laboratory diagnosis of gastrointestinal and pancreatic disorders. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. Philadelphia, Pa: Saunders Elsevier; 2006:chap 22.

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