The following are the subspecialties:
- Adolescent medicine.
- Allergy, Asthma and Immunology, concerned with the diagnosis, treatment and management of allergies, asthma and disorders of the immune system.
- Cardiology, dealing with disorders of the heart and blood vessels.
- Clinical cardiac electrophysiology.
- Critical care medicine.
- Endocrinology, dealing with disorders of the endocrine system and its specific secretions called hormones
- Gastroenterology, concerned with the field of digestive diseases
- Geriatric medicine
- Hematology, concerned with blood, the blood-forming organs and its disorders.
- Hospital medicine
- Infectious disease, concerned with disease caused by a biological agent such as by a virus, bacterium or parasite
- Interventional cardiology
- Medical oncology, dealing with the chemotherapeutic (chemical) treatment of cancer
- Nephrology, dealing with the study of the function and diseases of the kidney
- Pulmonology, dealing with diseases of the lungs and the respiratory tract
- Rheumatology, devoted to the diagnosis and therapy of rheumatic diseases.
- Sleep medicine
- Sports medicine