Book ACTH Test in Jammu | Adrenocorticotropic Hormone Blood Test

The Adrenocorticotropic Hormone test is a blood test that measures the level of ACTH, a peptide hormone produced and secreted by the anterior pituitary gland in response to corticotropin-releasing hormone from the hypothalamus. ACTH travels through the bloodstream to the adrenal cortex, where it stimulates the synthesis and secretion of cortisol, the body's primary stress hormone, as well as androgens and to a lesser extent aldosterone. The regulation of ACTH follows a classic negative feedback loop in which rising cortisol levels suppress both hypothalamic CRH and pituitary ACTH secretion, maintaining cortisol within a tightly controlled physiological range under normal circumstances. ACTH exhibits a pronounced diurnal rhythm, with levels peaking in the early morning between 6 AM and 8 AM, coinciding with the cortisol awakening response, and declining to their lowest point in the late evening and during the first half of the night. This diurnal pattern means that the timing of blood collection is critically important for accurate ACTH measurement and clinical interpretation, and samples must be collected under strictly controlled timing and handling conditions to yield reliable results. The clinical value of ACTH measurement lies in its ability to localise the cause of cortisol excess or deficiency to either a pituitary, adrenal, or ectopic source. In Cushing's syndrome, measuring ACTH distinguishes between ACTH-dependent causes including pituitary adenoma and ectopic ACTH secretion, and ACTH-independent causes such as adrenal adenoma or carcinoma. In adrenal insufficiency, ACTH measurement distinguishes primary adrenal failure from secondary pituitary-driven insufficiency, fundamentally directing the diagnostic workup and treatment approach. The test is performed on a small blood sample drawn from a vein under carefully timed and temperature-controlled conditions.

Doctors prescribe an ACTH test in the following situations: Investigating Cushing's syndrome in patients with central obesity, moon face, buffalo hump, purple striae, proximal muscle weakness, hypertension, and diabetes where ACTH measurement distinguishes ACTH-dependent disease from ACTH-independent adrenal causes, fundamentally directing further investigation toward pituitary MRI or adrenal imaging depending on the result. Diagnosing Cushing's disease specifically where an elevated ACTH in the presence of cortisol excess points toward a pituitary corticotroph adenoma as the source of autonomous ACTH oversecretion, requiring pituitary MRI and consideration of inferior petrosal sinus sampling for definitive localisation before surgical planning. Evaluating ectopic ACTH syndrome in patients with markedly elevated ACTH and cortisol where a pituitary source has been excluded, and where very high ACTH levels raise concern for ectopic ACTH secretion from occult malignancies including small cell lung cancer, carcinoid tumours, and pancreatic neuroendocrine tumours requiring whole body imaging for source localisation. Diagnosing primary adrenal insufficiency in patients with fatigue, weight loss, hyperpigmentation, postural hypotension, and hyponatraemia where a markedly elevated ACTH alongside low cortisol confirms Addison's disease caused by destruction of the adrenal cortex, most commonly by autoimmune adrenalitis in India. Distinguishing primary from secondary adrenal insufficiency where a low ACTH alongside low cortisol indicates secondary adrenal insufficiency caused by pituitary or hypothalamic pathology including pituitary tumours, pituitary apoplexy, or prolonged exogenous corticosteroid use that has suppressed the hypothalamic-pituitary-adrenal axis. Monitoring Nelson's syndrome in patients who have undergone bilateral adrenalectomy for Cushing's syndrome where progressive ACTH elevation indicates growth of the residual pituitary corticotroph tumour no longer suppressed by cortisol feedback, requiring pituitary imaging and consideration of surgical or radiation treatment.

The ACTH test measures the concentration of adrenocorticotropic hormone in the blood plasma, expressed in picograms per millilitre (pg/mL) or picomoles per litre (pmol/L). The normal reference range for a morning sample collected between 6 AM and 10 AM is 10 to 60 pg/mL, with values declining throughout the day to below 20 pg/mL in the evening. Results must always be interpreted alongside simultaneous serum cortisol measurement and in the context of collection timing. Normal (10 to 60 pg/mL Morning) A result within the normal morning range indicates appropriate pituitary ACTH secretion within expected physiological limits. In the context of adrenal or pituitary disease evaluation, a normal ACTH must be interpreted alongside simultaneous cortisol to assess whether the ACTH level is appropriate relative to the prevailing cortisol concentration, as a normal ACTH with low cortisol still indicates adrenal insufficiency. Low ACTH (Below 10 pg/mL) A low ACTH result in the context of low or normal cortisol indicates secondary adrenal insufficiency caused by pituitary or hypothalamic dysfunction. Common causes include pituitary adenoma, pituitary surgery or radiation, pituitary apoplexy, and prolonged exogenous corticosteroid use causing HPA axis suppression. A low ACTH alongside elevated cortisol in a patient with Cushing's syndrome features indicates an ACTH-independent adrenal cause such as adrenal adenoma or carcinoma requiring adrenal imaging. Elevated ACTH (Above 60 pg/mL Morning) An elevated ACTH alongside low cortisol confirms ACTH-dependent adrenal insufficiency consistent with primary adrenal failure or Addison's disease where the pituitary is appropriately attempting to stimulate a failing adrenal gland. An elevated ACTH alongside elevated cortisol and Cushing's syndrome features indicates ACTH-dependent Cushing's syndrome from either a pituitary adenoma or ectopic source, with very high levels above 200 pg/mL raising particular concern for ectopic ACTH secretion from malignancy.

Morning collection between 6 AM and 10 AM is a strict and non-negotiable requirement for the ACTH test, as ACTH follows a pronounced diurnal rhythm with peak levels in the early morning that decline substantially throughout the day. A sample collected outside this window cannot be accurately compared to established reference ranges and will produce a clinically uninterpretable result. Your phlebotomist appointment must be scheduled specifically within this early morning window. ACTH is an extremely labile peptide hormone that degrades rapidly at room temperature once collected. The blood sample must be collected into a pre-chilled EDTA tube, immediately placed on ice, and transported to the laboratory within 15 to 30 minutes of collection for centrifugation and plasma separation. Inform SecondMedic at the time of booking that the ACTH test requires cold chain specimen handling so that appropriate arrangements can be made in advance to ensure sample integrity. Inform your doctor about all corticosteroid medications currently being taken, including oral, inhaled, topical, and injected steroids, as exogenous corticosteroids suppress ACTH through negative feedback and will produce a falsely low result. Avoid physical and psychological stress, strenuous exercise, and sleep deprivation in the 24 hours before testing as these acutely elevate ACTH. Fasting from midnight before the morning collection is recommended when ACTH is ordered alongside cortisol and other hormonal parameters. Staying well hydrated before the draw facilitates easier venous access and a smooth collection experience.

If you are booking through the SecondMedic platform the ACTH test price in Jammu can cost you around Rs. 847. You may also consider booking a comprehensive adrenal function panel that includes ACTH alongside morning cortisol, 24-hour urinary free cortisol, DHEAS, and aldosterone for a complete assessment of hypothalamic-pituitary-adrenal axis function at a bundled price on SecondMedic.

SecondMedic offers convenient home sample collection for the ACTH test in Jammu, making it easy to get tested without visiting a diagnostic centre. Home collection is available free of charge for orders above Rs. 300. A trained phlebotomist will visit your preferred address between 7 AM and 10 AM specifically for this test given its strict timing requirement, seven days a week including Sundays and public holidays. Your blood sample is processed at NABL-accredited partner laboratories, and your report is delivered within 24 hours directly to your WhatsApp and email.