This isolation Adrenocorticotropic Hormone (ACTH) (Plasma) test measures the level of ACTH in your blood, a hormone produced by the pituitary gland that stimulates the adrenal glands to release cortisol. It is used to help diagnose conditions affecting the adrenal or pituitary glands, such as Cushing’s syndrome, Addison’s disease, or secondary adrenal insufficiency.

Although fasting is not required for this test, it is typically done in the morning, as ACTH levels follow a diurnal rhythm and peak early in the day.

After order completion, a provider will submit your Lab Requisition Form to Labcorp, within 24 (business) hours. You will also be emailed a copy of your LRF to take to your nearest Labcorp with valid photo ID. Your results will be available in your Labcorp Patient Portal as soon as they become available, and we will securely email you a PDF copy. Email verification will be required, please check your spam folder.