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Test Code ADCTH Adrenocorticotropic Hormone (ADCTH), Plasma

Specimen Type



EDTA (Lavender top) on ice

Preferred Volume

4 mL

Offsite Collection Instructions

1. Specimen should be collected in iced/cooled EDTA tubes.

2. Plasma tubes should be immediately places on ice after collection.

3. Using a refrigerated centrifuged, spin and aliquot immediately.

4. Aliquoted samples should be frozen at -20°C prior and during transportation.

5. If above criteria are not met, specimen will be rejected.

UCMC Collection Instructions

1. Specimen should be collected in iced/cooled EDTA tubes. 

2. Immediately place the tube on ice and send to Lab Service Center

3. Samples received after 2 hours will be rejected.

4. Samples received not on ice will be rejected.

5. Add-on request not available for this test.




Turnaround Time

4 hours

STAT Availability

Not Available

Test Usage

Determining the cause of hypercortisolism and hypocortisolism states

Test Methodology

Electrochemiluminescence immunoassay (ECLIA)

CPT Code


Test Includes

Quantitative determination of Adrenocorticotropic Hormone (ACTH) in plasma

Reference Range

5-52 pg/mL

STIM Test Reference Range: Reference ranges for ACTH that is ordered as part of a specific stimulation/suppression protocol are specific to the protocol utilized by the ordering physician and are therefore subject to ordering physician’s interpretation.

Critical Results


Test Limitations

Patients taking glucocorticoids may have suppressed levels of ACTH with an apparent high level of cortisol.

Minimum Volume

2 mL

Fee Code