Addison’s disease diagnosis involves specific blood tests and imaging. Learn about the ACTH stimulation test procedure, preparation, and how results are interpreted.
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Accurate diagnosis and evaluation are the cornerstones of effective treatment for Addison’s disease, a rare form of primary adrenal insufficiency. International patients seeking specialized endocrine care often wonder how clinicians confirm the condition and plan long‑term monitoring. At Liv Hospital, our multidisciplinary team follows evidence‑based protocols that begin with a thorough clinical assessment and extend to advanced laboratory and imaging techniques. Studies show that delayed diagnosis can increase morbidity, making early detection essential for optimal outcomes.
This page provides a step‑by‑step overview of the diagnostic pathway, from recognizing hallmark symptoms to interpreting dynamic endocrine tests. Whether you are a patient, a family member, or a referring physician, the information below will help you understand what to expect during the evaluation process at our JCI‑accredited facility.
Patients with Addison’s disease often present with a constellation of nonspecific signs that can mimic other disorders. The first step in the diagnosis and evaluation process is a detailed medical history and physical examination focused on adrenal insufficiency.
Clinicians look for hypotension, orthostatic changes, and characteristic hyperpigmentation. A comprehensive review also includes assessing for autoimmune comorbidities such as thyroid disease or type 1 diabetes, which frequently coexist with adrenal insufficiency.
Identifying these clues early guides the subsequent laboratory workup, ensuring that the diagnosis and evaluation proceeds efficiently.
Laboratory testing confirms adrenal insufficiency and distinguishes primary from secondary causes. The core panel includes serum electrolytes, glucose, and specific hormone measurements.
Interpretation of these results must consider the time of day and the patient’s stress status. If basal cortisol is indeterminate (5–15 µg/dL), dynamic testing is warranted.
The gold standard for confirming adrenal insufficiency is the ACTH (cosyntropin) stimulation test, a pivotal component of the diagnosis and evaluation protocol.
A normal adrenal response yields cortisol > 18 µg/dL at either post‑stimulus time point. Failure to reach this threshold confirms primary adrenal insufficiency.
In rare cases where the standard test is inconclusive, a low‑dose (1 µg) ACTH test or insulin‑induced hypoglycemia test may be employed.
Imaging helps identify structural causes of adrenal insufficiency and assesses for associated pathologies.
Typical findings in autoimmune Addison’s disease include normal‑sized or mildly atrophic adrenal glands. Conversely, bilateral enlargement suggests infectious or infiltrative etiologies, prompting targeted antimicrobial or oncologic treatment.
Additional evaluations may include:
Accurate diagnosis and evaluation requires ruling out conditions that present with similar electrolyte or hormonal disturbances.
By integrating clinical, biochemical, and imaging data, clinicians at Liv Hospital can confidently differentiate primary adrenal insufficiency from these alternatives, ensuring that patients receive the most appropriate therapy.
Once the diagnosis is established, ongoing evaluation focuses on hormone replacement adequacy, quality of life, and prevention of adrenal crises.
Individualized dosing of hydrocortisone or cortisone acetate is adjusted based on symptoms, laboratory trends, and lifestyle factors. Liv Hospital’s endocrinology team collaborates with nutritionists, psychologists, and physiotherapists to address the holistic needs of each patient.
Regular reassessment also includes evaluating for new autoimmune comorbidities, which can arise over time. Early detection of thyroid or type 1 diabetes onset enables prompt management and reduces complication risk.
Liv Hospital offers JCI‑accredited, patient‑centered endocrine services tailored to international patients. Our Istanbul‑based team combines cutting‑edge diagnostics with compassionate care, providing seamless coordination of appointments, interpreter support, and accommodation assistance. With a proven track record in managing complex adrenal disorders, we ensure that every step of the diagnosis and evaluation process is performed to the highest global standards.
Ready to start your personalized evaluation for Addison’s disease? Contact Liv Hospital today to schedule a comprehensive endocrine consultation and take the first step toward optimal health.
Liv Hospital Ulus
Assoc. Prof. MD. Seda Turgut
Endocrinology and Metabolism
Liv Hospital Ulus
Prof. MD. Demet Yetkin
Endocrinology and Metabolism
Liv Hospital Vadistanbul
Prof. MD. Berçem Ayçiçek
Endocrinology and Metabolism
Liv Hospital Vadistanbul
Prof. MD. Gönül Çatlı
Pediatric Endocrinology
Liv Hospital Vadistanbul
Prof. MD. Kubilay Ükinç
Endocrinology and Metabolism
Liv Hospital Bahçeşehir
Assoc. Prof. MD. Sevil Arı Yuca
Pediatric Endocrinology and Metabolic Diseases
Liv Hospital Bahçeşehir
Assoc. Prof. MD. Ufuk Özuğuz
Endocrinology and Metabolism
Liv Hospital Bahçeşehir
Spec. MD. Hüseyin Çelik
Endocrinology and Metabolism
Liv Hospital Topkapı
Prof. MD. Mehmet Aşık
Endocrinology and Metabolism
Liv Hospital Topkapı
Prof. MD. Nujen Çolak Bozkurt
Endocrinology and Metabolism
Liv Hospital Ankara
Prof. MD. Banu Aktaş Yılmaz
Endocrinology and Metabolism
Liv Hospital Ankara
Prof. MD. Peyami Cinaz
Pediatric Endocrinology
Liv Hospital Ankara
Prof. MD. Serdar Güler
Endocrinology and Metabolism
Liv Hospital Ankara
Spec. MD. Elif Sevil Alagüney
Endocrinology and Metabolism
Liv Hospital Gaziantep
Prof. MD. Zeynel Beyhan
Endocrinology and Metabolic Diseases
Liv Hospital Gaziantep
Spec. MD. Tahsin Özenmiş
Endocrinology and Metabolism
Liv Hospital Samsun
Assoc. Prof. MD. Gülçin Cengiz Ecemiş
Endocrinology and Metabolism
Liv Hospital Samsun
Spec. MD. Esra Tutal
Endocrinology and Metabolic Diseases
Liv Bona Dea Hospital Bakü
MD. FİDAN QULU
Endocrinology and Metabolism
Spec. MD. Zümrüt Kocabey Sütçü
Pediatric Endocrinology
Liv Hospital Ulus + Liv Hospital Vadistanbul + Liv Hospital Topkapı
Prof. MD. Cengiz Kara
Pediatric Endocrinology
Send us all your questions or requests, and our expert team will assist you.
The initial laboratory workup includes measuring a morning serum cortisol; values below 5 µg/dL strongly suggest adrenal insufficiency, while 5–15 µg/dL is indeterminate and prompts dynamic testing. Plasma ACTH is typically high in primary Addison’s disease, distinguishing it from secondary causes where ACTH is low. Electrolyte panels often reveal hyponatremia and hyperkalemia due to aldosterone deficiency. Glucose may be low, especially during stress. Autoimmune adrenalitis is identified by 21‑hydroxylase antibodies. If basal cortisol is borderline, a cosyntropin (ACTH) stimulation test is performed to assess adrenal reserve.
The initial laboratory workup includes measuring a morning serum cortisol; values below 5 µg/dL strongly suggest adrenal insufficiency, while 5–15 µg/dL is indeterminate and prompts dynamic testing. Plasma ACTH is typically high in primary Addison’s disease, distinguishing it from secondary causes where ACTH is low. Electrolyte panels often reveal hyponatremia and hyperkalemia due to aldosterone deficiency. Glucose may be low, especially during stress. Autoimmune adrenalitis is identified by 21‑hydroxylase antibodies. If basal cortisol is borderline, a cosyntropin (ACTH) stimulation test is performed to assess adrenal reserve.
The initial laboratory workup includes measuring a morning serum cortisol; values below 5 µg/dL strongly suggest adrenal insufficiency, while 5–15 µg/dL is indeterminate and prompts dynamic testing. Plasma ACTH is typically high in primary Addison’s disease, distinguishing it from secondary causes where ACTH is low. Electrolyte panels often reveal hyponatremia and hyperkalemia due to aldosterone deficiency. Glucose may be low, especially during stress. Autoimmune adrenalitis is identified by 21‑hydroxylase antibodies. If basal cortisol is borderline, a cosyntropin (ACTH) stimulation test is performed to assess adrenal reserve.
The cosyntropin stimulation test is the gold standard for confirming primary adrenal insufficiency. After drawing a baseline cortisol level, 250 µg of synthetic ACTH (cosyntropin) is administered intravenously. Cortisol concentrations are then measured at 30 and 60 minutes post‑injection. A normal response is a cortisol level ≥18 µg/dL at either time point, indicating adequate adrenal reserve. Values below this threshold confirm impaired adrenal function consistent with Addison’s disease. In rare cases where the standard dose test is inconclusive, a low‑dose (1 µg) ACTH test or an insulin‑induced hypoglycemia test may be used.
Once biochemical tests confirm adrenal insufficiency, imaging helps determine the underlying cause. A contrast‑enhanced CT scan of the abdomen is the first‑line modality, visualizing adrenal size, calcifications, hemorrhage, or masses. MRI is preferred for detecting infiltrative conditions such as tuberculosis, sarcoidosis, or metastatic lesions. Ultrasound has limited utility but may be employed in pediatric patients. Typical findings in autoimmune Addison’s disease are normal‑sized or mildly atrophic adrenal glands, whereas bilateral enlargement suggests infectious or infiltrative etiologies, guiding further targeted therapy.
Long‑term monitoring focuses on hormone replacement adequacy, electrolyte balance, and quality of life. Routine follow‑up every 3–6 months includes serum electrolytes, cortisol, and ACTH levels to adjust hydrocortisone or cortisone acetate dosing. An annual bone mineral density scan is advised because chronic glucocorticoid therapy can reduce bone mass. Patients receive written instructions for emergency hydrocortisone injection and are educated on dose adjustments during illness or surgery. The multidisciplinary team also screens annually for new autoimmune comorbidities such as thyroid disease or type 1 diabetes, enabling early intervention.
Liv Hospital’s Istanbul‑based endocrine department combines cutting‑edge diagnostic protocols with a patient‑centered approach tailored to international visitors. The facility is JCI‑accredited, ensuring adherence to global quality standards. Multidisciplinary teams coordinate laboratory, imaging, and clinical assessments efficiently, reducing diagnostic delays. Language interpreters, visa assistance, and accommodation services simplify the experience for overseas patients. Proven expertise in managing complex adrenal disorders, including autoimmune and infectious etiologies, guarantees that each step of the diagnosis and evaluation process meets the highest clinical standards.
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