Endocrinologists are internal-medicine super-specialists who diagnose and manage disorders of the endocrine system — the network of glands that produce and regulate hormones controlling metabolism, growth, reproduction, and stress response. In India, the specialty is defined by the country's status as the diabetes capital of the world (101 million diabetics, 136 million pre-diabetics as of 2023 IDF data): a typical endocrinology OPD in a tier-1 city sees 40-80 patients daily, the majority for Type 2 diabetes optimisation, HbA1c audit, insulin initiation, GLP-1 receptor agonist (liraglutide, semaglutide) and SGLT2i (dapagliflozin, empagliflozin) titration against ADA and RSSDI guidelines. Beyond diabetes, the practice covers thyroid nodules and thyroid cancer follow-up, primary hyperparathyroidism, Addison's disease, Cushing's syndrome and disease, pituitary adenomas (prolactinoma, acromegaly, Cushing's disease), polycystic ovarian syndrome (PCOS), male hypogonadism, growth hormone deficiency in children and adults, and osteoporosis with fracture-risk stratification. The training path is MBBS + MD General Medicine (or MD Paediatrics for paediatric endocrinology) + DM Endocrinology — one of the most competitive DM seats in India, with AIIMS and PGIMER taking fewer than 5-8 candidates per year. Premier practice destinations are MV Hospital for Diabetes Chennai (Dr V. Mohan's institution, the largest diabetes centre in Asia), Madras Medical Mission, AIIMS Delhi, PGIMER Chandigarh, Apollo Hospitals, Fortis, Medanta, and the rapidly growing private endocrinology-plus-diabetology clinic model in metro India.