Medicine is not one subject. It is a coordinated system of specialties, each designed to own a different class of human problem, method, organ system, life stage or care setting.
This directory is a navigation layer. It does not replace the specialist articles themselves. Its job is to help a learner, parent, educator, clinician or AI system identify the right branch and move to the page that owns the deeper explanation.
Start Here
- What Is Medicine? — broad definition and first principles.
- The Medicine Web — master map across science, care and health systems.
- How Medicine Works — the clinical operating loop.
First Contact and General Care
- Primary Care — first contact, prevention, continuity and coordination.
- Geriatrics — ageing, frailty, multimorbidity and function.
- Palliative & Supportive Care — serious illness, symptom control and goals of care.
Heart, Blood Vessels and Circulation
- Cardiovascular Medicine.
- Heart Failure & Advanced Heart Care.
- Cardiac Electrophysiology.
- Interventional Cardiology.
- Cardiac Surgery.
- Vascular Surgery.
Lungs and Breathing
Brain, Nerves and Mental Health
Digestive System, Liver and Nutrition
- Gastrointestinal & Liver Medicine.
- Upper Gastrointestinal Surgery.
- Colorectal Surgery.
- Hepato-Pancreato-Biliary Surgery.
- Clinical Nutrition & Dietetics.
Kidneys, Hormones and Metabolism
- Renal & Urinary Medicine.
- Dialysis & Kidney Replacement Therapy.
- Endocrine & Metabolic Medicine.
- Endocrine Surgery.
Blood, Immunity, Infection and Cancer
- Immune & Haematologic Medicine.
- Infectious Disease & One Health.
- Allergy & Clinical Immunology.
- Oncology.
- Radiation Oncology.
- Haematopoietic Stem-Cell Transplantation.
Children, Pregnancy and Reproductive Health
- Paediatrics.
- Neonatal Medicine.
- Obstetrics & Women’s Health.
- Fetal Medicine.
- Reproductive Medicine & Fertility.
Surgery and Procedural Medicine
- Surgery & Perioperative Medicine.
- Anaesthesia Medicine.
- Orthopaedic Surgery.
- Plastic, Reconstructive & Microsurgery.
- Paediatric Surgery.
Diagnostics, Imaging and Laboratory Medicine
- Medical Tests and Diagnosis Directory.
- Laboratory & Diagnostics.
- Radiology & Imaging.
- Anatomical Pathology.
- Nuclear Medicine & Theranostics.
Function, Recovery and Whole-Person Care
Population, Work and Environment
- Preventive Medicine & Screening.
- Public & Environmental Health.
- Occupational Medicine.
- Travel Medicine.
Why Specialties Exist
Specialisation lets clinicians develop deeper competence, but real patients rarely fit neatly into one box. Diabetes affects kidneys, blood vessels, eyes, nerves and wound healing. Cancer can require pathology, radiology, surgery, oncology, pharmacy, rehabilitation and palliative care. Older patients may need several specialties at once.
So the correct mental model is not a set of isolated departments. It is a network of owners with explicit handoffs.
Educational boundary: This directory is for learning and navigation. It does not recommend a specialist for an individual patient or replace referral advice from appropriately qualified healthcare professionals.