Basic sciences

• Anatomy
• Biochemistry
• Biostatistics
• Cytology
• Embryology
• Epidemiology
• Genetics
• Histology
• Immunology
• Microbiology
• Neuroscience
• Nutrition
• Pathology
• Pharmacology
• Physiology
• Toxicology

Diagnostic specialties

• Clinical laboratory science:
  • Transfusion medicine
  • Cellular pathology
  • Clinical chemistry
  • Hematology
  • Clinical microbiology
  • Clinical immunology
• Radiology
  • Interventional radiology
  • Nuclear Medicine
• Clinical Neurophysiology
  • Electroencephalography
  • Electromyography
  • Evoked potential
  • Nerve conduction study
  • Polysomnography / Sleep Study

 
Clinical disciplines

• Anesthesiology
• Dermatology
• Emergency medicine
• General practice, family practice, family medicine
• Hospital medicine
• Internal medicine

There are several subdisciplines of internal medicine:

• Cardiology
• Critical care medicine or intensive care medicine
• Endocrinology
• Gastroenterology
• Geriatrics
• Hematology
• Hepatology
• Infectious diseases
• Nephrology
• Oncology
• Proctology
• Pulmonology
• Rheumatology
• Naturopathic medicine
• Neurology
• Obstetrics and gynecology
• Palliative care
• Pediatrics

Most subspecialities of adult medicine have a pediatric equivalent such as

o    pediatric cardiology,

o    pediatric endocrinology,

o    pediatric gastroenterology,

o    pediatric hematology,

o    pediatric oncology,

o    pediatric ophthalmology, and

o    neonatology.

• Physical medicine and rehabilitation
• Preventive medicine
  • Community health or public health
  • Occupational medicine
• Psychiatry

There are several subdisciplines of psychiatry:

• Child and adolescent psychiatry
• Geriatric psychiatry
• Addiction psychiatry
• Forensic psychiatry
• Radiation therapy
• Surgical specialties
  • General surgery
  • Cardiovascular surgery
  • Neurosurgery
  • Maxillofacial surgery
  • Ophthalmology
  • Orthopedic surgery
  • Otolaryngology (or otorhinolaryngology or ENT/ear-nose-throat)
  • Pediatric surgery
  • Plastic surgery
  • Surgical oncology
  • Urology
  • Vascular surgery
• Urgent care
• Gender-based medicine

Interdisciplinary fields

Interdisciplinary sub-specialties of medicine are:

• Aerospace medicine
• Bioethics
• Clinical pharmacology
• Conservation medicine
• Diving medicine (or hyperbaric medicine)
• Evolutionary medicine
• Forensic medicine
• Medical humanities
  • Medical anthropology
• Medical informatics and medical computer science
• Nosology
• Sports medicine
• Therapeutics
• Travel medicine

 For a more detailed discussion of the above specialties; click here