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Test Name

ACTH, Plasma

To view specimen requirements and codes please Select a regional laboratory.

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CPT Code(s)**

82024
**IMPORTANT: CPT Code is informational only; obtain the Test Code for ordering.

Methodology

Immunoassay (IA)

Limitations

With patients receiving more than 5mg/day of biotin, a sample should be taken no sooner than eight hours after previous dose. Patients treated with monoclonal mouse antibodies may have inaccurate results. High titer of antibodies such as streptavidin and ruthenium may cause interference. Due to its correlation with cortisol levels, ACTH concentration is affected by stress. Any single measure may be within the reference range for patients with increased production (Cushing's disease) or minimal production of ACTH.

Reference Range(s)

<3 Years Not established
3-17 Years 9-57 pg/mL
≥18 Years 6-50 pg/mL

Clinical Significance

Determination of ACTH is useful in differentiating between primary and secondary adrenocortical hypo- and hyperfunctional disorders: Addison's Disease, Cushing's Syndrome, Adrenal Carcinoma, Ectopic ACTH Syndrome, Nodular Hyperplasia.

Alternative Name(s)

Corticotropin,Adrenocorticotropic Hormone

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

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ACTH, Plasma
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