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A medical speciality is a branch of medical practice that is focused on a defined group of patients, diseases, skills or philosophy, e.g. children ( paediatrics), cancer ( oncology), laboratory medicine ( pathology) or primary care ( family medicine). After completing medical school, physicians or surgeons usually further their medical education in a specific specialty of medicine by completing a multiple year residency to become a medical specialist. 
- 1 History of medical specialization
- 2 Classification of medical specialization
- 3 Specialties that are common worldwide
- 4 List of specialties recognized in the European Union and European Economic Area
- 5 List of North American medical specialties and others
- 6 Salaries
- 7 Specialties by country
- 8 Demography
- 9 Satisfaction and burnout
- 10 See also
- 11 References
To a certain extent, medical practitioners have long been specialized. According to Galen, specialization was common among Roman physicians. The particular system of modern medical specialties evolved gradually during the 19th century. Informal social recognition of medical specialization evolved before the formal legal system. The particular subdivision of the practice of medicine into various specialties varies from country to country, and is somewhat arbitrary. 
Medical specialties can be classified along several axes. These are:
- Surgical or internal medicine
- Age range of patients
- Diagnostic or therapeutic
- Organ-based or technique-based
Throughout history, the most important has been the division into surgical and internal medicine specialties. The surgical specialties are those in which an important part of diagnosis and treatment is achieved through major surgical techniques. The internal medicine specialties are the specialties in which the main diagnosis and treatment is never major surgery. In some countries, anesthesiology is classified as a surgical discipline, since it is vital in the surgical process, though anesthesiologists never perform major surgery themselves.
Many specialties are organ-based. Many symptoms and diseases come from a particular organ. Others are based mainly around a set of techniques, such as radiology, which was originally based around X-rays.
The age range of patients seen by any given specialist can be quite variable. Paediatricians handle most complaints and diseases in children that do not require surgery, and there are several subspecialties (formally or informally) in paediatrics that mimic the organ-based specialties in adults. Paediatric surgery may or may not be a separate specialty that handles some kinds of surgical complaints in children.
A further subdivision is the diagnostic versus therapeutic specialties. While the diagnostic process is of great importance in all specialties, some specialists perform mainly or only diagnostic examinations, such as pathology, clinical neurophysiology, and radiology. This line is becoming somewhat blurred with interventional radiology, an evolving field that uses image expertise to perform minimally invasive procedures.
|Specialty||Can be subspecialty of||Diagnostic (D) or therapeutic (T) specialty||Surgical (S) or internal medicine specialty (I)||Age range of patients||Organ-based (O) or technique-based (T)|
|Allergy and immunology||Paediatrics or Internal medicine||Both||I||All||O|
|Cardiothoracic surgery||General surgery||T||S||Adults||O|
|Child and adolescent psychiatry and psychotherapy||Psychiatry||T||I||Paediatric||T|
|Colon and Rectal Surgery||General Surgery||Both||S||All||O|
|Geriatrics||Internal medicine or family medicine||T||I||Geriatric||Multidisciplinary|
|Obstetrics and gynaecology||None||T||S||All||O|
|Hospice and palliative medicine||Various||Both||Neither||All||Neither|
|Infectious disease||Pediatrics or Internal medicine||Both||I||All||Neither|
|Intensive care medicine||Anaesthesiology||T||Both||All||Both|
|Vascular medicine||Internal medicine||T||I||Adults||O|
|Oral and maxillofacial surgery||Surgery||T||S||All||O|
|Paediatric endocrinology and diabetes||Paediatrics||T||I||Paediatric||O|
|Paediatric gastroenterology, hepatology and nutrition||Paediatrics||T||I||Paediatric||O|
|Paediatric haematology and oncology||Paediatrics||T||I||Paediatric||O|
|Paediatric infectious diseases||Paediatrics||T||I||Paediatric||O|
|Paediatric respiratory medicine||Paediatrics||T||I||Paediatric||O|
|Paediatric surgery||General Surgery||T||S||Paediatric||O|
|Physical medicine and rehabilitation||None||T||I||All||Multidisciplinary|
|Plastic, reconstructive and aesthetic surgery||General surgery||T||S||All||O|
|Sports medicine||Family medicine||Both||Neither||All||Multidisciplinary|
|Vascular surgery||General surgery||T||S||All||O|
The European Union publishes a list of specialties recognized in the European Union, and by extension, the European Economic Area.  Note that there is substantial overlap between some of the specialties and it is likely that for example "Clinical radiology" and "Radiology" refer to a large degree to the same pattern of practice across Europe.
- Accident and emergency medicine
- Biological hematology
- Child psychiatry
- Clinical biology
- Clinical chemistry
- Clinical neurophysiology
- Craniofacial surgery
- Dental, oral and maxillo-facial surgery
- Family and General Medicine
- Gastro-enterologic surgery
- General hematology
- General Practice
- General surgery
- Infectious diseases
- Internal medicine
- Laboratory medicine
- Maxillo-facial surgery
- Nuclear medicine
- Obstetrics and gynecology
- Occupational medicine
- Paediatric surgery
- Physical medicine and rehabilitation
- Plastic surgery
- Podiatric Surgery
- Public health and Preventive Medicine
- Radiation Oncology
- Respiratory medicine
- Thoracic surgery
- Tropical medicine
- Vascular surgery
In this table, as in many healthcare arenas, medical specialties are organized into the following groups:
- Surgical specialties focus on manually operative and instrumental techniques to treat disease.
- Medical specialties that focus on the diagnosis and non-surgical treatment of disease.
- Diagnostic specialties focus more purely on diagnosis of disorders.
|Allergy and immunology||Allergic reactions, asthma, and the immune system|
|Anesthesiology||AN, PAN||Surgery [ citation needed]||Anesthesia|
|Cardiology||Medicine||Disease of the cardiovascular system|
|Cardiovascular surgery||Surgery||The operation of heart and major blood vessels of the chest.|
|Clinical laboratory sciences||Diagnostic||
||Application of diagnostic techniques in medical laboratories such as assays, microscope analysis.|
|Dermatology||D, DS||Medicine||Dermatology, Mohs surgery||Skin and its appendages ( hair, nails, sweat glands etc.).|
|Dietetics||RD ||Food and nutrition|
|Emergency medicine||EM||Medicine||The initial management of emergent medical conditions, often in hospital emergency departments or the field.|
|Endocrinology||Medicine||The endocrine system (i.e., endocrine glands and hormones) and its diseases, including diabetes and thyroid diseases.|
||Continuing, comprehensive healthcare for the individual and family, integrating the biological, clinical and behavioral sciences to treat patients of all ages, sexes, organ systems, and diseases.|
|Gastroenterology||GI||Medicine||The alimentary tract|
|Geriatrics||IMG||Medicine [ citation needed]||Elderly patients|
|Gynecology||Female reproductive health|
|Hepatology||Medicine||The liver and biliary tract, usually a part of gastroenterology.|
|Infectious disease||ID||Medicine||Diseases caused by biological agents|
|Intensive care medicine||Medicine||Life support and management of critically ill patients, often in an ICU.|
|Medical research||Anatomy, Biochemistry, Embryology, Genetics, Pharmacology, Toxicology||Care of hospitalized patients|
|Neurology||N||Medicine||Diseases involving the central, peripheral, and autonomic nervous systems|
|Neurosurgery||NS||Surgery||Disease of the central nervous system, peripheral nervous system, and spinal column.|
|Obstetrics and gynecology||OB/GYN||Surgery [ citation needed]|
|Oncology||ON||Medicine||Cancer and other malignant diseases, often grouped with hematology.|
|Ophthalmology||OPH||Surgery||Retina, Cornea||Diseases of the visual pathways, including the eyes, brain, etc.|
|Oral and maxillofacial surgery||Maxfacs, OMS||Surgery||
||Disease of the head, neck, face, jaws and the hard and soft tissues of the oral and maxillofacial region.|
|Orthopedic surgery||ORS||Surgery||Hand surgery, surgical sports medicine, adult reconstruction, spine surgery, foot and ankle, musculoskeletal oncology, orthopedic trauma surgery, pediatric orthopedic surgery||Injury and disease of the musculoskeletal system.|
|Otorhinolaryngology, or ENT||ORL, ENT||Surgery||Head and neck, facial cosmetic surgery, Neurotology, Laryngology||Treatment of ear, nose, and throat disorders. The term head and neck surgery defines a closely related specialty that is concerned mainly with the surgical management of cancer of the same anatomical structures.|
|Palliative care||PLM||Medicine||A relatively modern branch of clinical medicine that deals with pain and symptom relief and emotional support in patients with terminal illnesses including cancer and heart failure.|
|Pathology||PTH||Diagnostic||Understanding disease through examination of molecules, cells, tissues and organs. The term encompasses both the medical specialty that uses tissues and body fluids to obtain clinically useful information and the related scientific study of disease processes.|
|Pediatrics||PD||Medicine||Children. Like internal medicine, pediatrics has many sub-specialties for specific age ranges, organ systems, disease classes, and sites of care delivery. Most sub-specialties of adult medicine have a pediatric equivalent such as pediatric cardiology, pediatric emergency medicine, pediatric endocrinology, pediatric gastroenterology, pediatric hematology, pediatric oncology, pediatric ophthalmology, and neonatology.||deals with the medical care of infants, children, and adolescents (from newborn to age 16-21, depending on the country).|
|Pediatric surgery||Surgery||Treats a wide variety of thoracic and abdominal (and sometimes urologic) diseases of childhood.|
|Physical medicine and rehabilitation Or Physiatry||PM&R||Medicine||Concerned with functional improvement after injury, illness, or congenital disorders.|
||Elective cosmetic surgery as well as reconstructive surgery after traumatic or operative mutilation.|
||Elective podiatric surgery of the foot and ankle, lower limb diabetic wound and salvation, peripheral vascular disease limb preservation, lower limb mononeuropathy conditions. Reconstructive foot & ankle surgery.|
|Proctology||PRO||Medicine||(or Colorectal Surgery) Treats disease in the rectum, anus, and colon.|
||The bio-psycho-social study of the etiology, diagnosis, treatment and prevention of cognitive, perceptual, emotional and behavioral disorders. Related non-medical fields include psychotherapy and clinical psychology.|
|Pulmonology||Medicine||The lungs and respiratory system. Pulmonology is generally considered a branch of internal medicine, although it is closely related to intensive care medicine when dealing with patients requiring mechanical ventilation.|
|Public Health||Public health focuses on the health of populations. Physicians employed in this field work in policy, research or health promotion, taking a broad view of health that encompasses the social determinants of health.|
|Radiology||R, DR||Diagnostic and Therapeutic||
||The use of expertise in radiation in the context of medical imaging for diagnosis or image guided minimally invasive therapy. X-rays, etc.|
|Rheumatology||RHU||Medicine||Autoimmune and inflammatory diseases of the joints and other organ systems, such as arthritis and other rheumatic diseases.|
|Surgical oncology||SO||Surgery||Curative and palliative surgical approaches to cancer treatment.|
|Thoracic surgery||TS||Surgery||Surgery of the organs of the thoracic cavity: the heart, lungs, and great vessels.|
|Transplant surgery||TTS||Surgery||Transplantation of organs from one body to another|
|Urgent Care Medicine||UCM||Medicine||Immediate medical care offering outpatient care for the treatment of acute and chronic illness and injury|
|Urology||U||Surgery||Urinary tracts of males and females, and the male reproductive system. It is often practiced together with andrology ("men's health").|
|Vascular surgery||VS||Surgery||The peripheral blood vessels – those outside the chest (usually operated on by cardiovascular surgeons) and outside the central nervous system (treated by neurosurgery)|
The table below details the average range of salaries for physicians in the US of selected specialties as of July 2010. Also given in the average number of hours worked per week for full-time physicians (2003 data).
|Specialty||Median salary (USD) ||Average hours
|Average salary/hour (USD) |
|Anaesthesia||331,000 to $423,507||61|
|Dermatology||313,100 to $480,088||45.5||103|
|Emergency medicine||239,000 to $316,296||46||87|
|Cardiac Surgery||218,684 to $500,000||55|
|Family medicine||175,000 to $220,196||52.5||58|
|Internal medicine||184,200 to $231,691||57||58|
|Neurology||213,000 to $301,327||55.5||93|
|Obstetrics and Gynecology||251,500 to $326,924||61||83|
|Ophthalmology||150,000 to $351,000||47|
|Orthopedic surgery||397,879 to $600,000||58|
|Otolaryngology||191,000 to $393,000||53.5|
|Oral and Maxillofacial Surgery||260,000 to $440,210||53|
|Pediatrics||160,111 to $228,750||54||69|
|Podiatry||170,800 to $315,150||45||80|
|Psychiatry||173,800 to $248,198||48||72|
|Radiology (diagnostic)||377,300 to $478,000||58|
|Surgery (general)||284,642 to $383,333||60|
|Urology||331,192 to $443,518||60.5|
|Neurosurgery||350,000 to $705,000||132|
|Plastic surgery||265,000 to $500,000||114|
|Gastroenterology||251,026 to $396,450||93|
|Pulmonology||165,000 to $365,875||72|
Specialty training in Australia and New Zealand is overseen by the specialty colleges:
- Australasian College for Emergency Medicine
- Australasian College of Dermatologists
- Australasian College of Physical Medicine
- Australasian College of Podiatric Surgeons
- Australasian College of Sports Physicians
- Australian and New Zealand College of Anaesthetists
- Australasian Faculty of Rehabilitation Medicine
- Australian College of Rural and Remote Medicine
- College of Intensive Care Medicine
- Royal Australasian College of Dental Surgeons (supervises training of medical practitioners specializing in Oral and Maxillofacial Surgery in addition to its role in the training of dentists)
- Royal Australasian College of Medical Administrators
- Royal Australasian College of Physicians
- Royal Australasian College of Surgeons
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists
- Royal Australian and New Zealand College of Ophthalmologists
- Royal Australian and New Zealand College of Psychiatrists
- Royal Australian and New Zealand College of Radiologists
- Royal Australian College of General Practitioners
- Royal New Zealand College of General Practitioners
- Royal College of Pathologists of Australasia
Specialty training in Canada is overseen by the Royal College of Physicians and Surgeons of Canada, the College of Family Physicians of Canada, and by Collège des médecins du Québec.
In Germany these doctors use the term Facharzt.
Specialty training in India is overseen by the Medical Council of India, which is responsible for recognition of post graduate training and by the National Board of Examinations. And education of Ayurveda in overseen by Central Council of Indian Medicine (CCIM), the council conducts u.g and p.g courses all over India, while Central Council of Homoeopathy does the same in the field of Homeopathy.
In Sweden, a medical license is required before commencing specialty training. Those graduating from Swedish medical schools are first required to do a rotational internship of about 1.5 to 2 years in various specialties before attaining a medical license. The specialist training lasts 5 years. 
There are three agencies or organizations in the United States that collectively oversee physician board certification of MD and DO physicians in the United States in the 26 approved medical specialties recognized in the country. These organizations are the American Board of Medical Specialties (ABMS) and the American Medical Association (AMA); the American Osteopathic Association Bureau of Osteopathic Specialists (AOABOS) and the American Osteopathic Association; the American Board of Physician Specialties (ABPS) and the American Association of Physician Specialists (AAPS). Each of these agencies and their associated national medical organization functions as its various specialty academies, colleges and societies.
|Certifying board||National organization||Physician type|
|ABMS||AMA||MD and DO|
|ABPS||AAPS||MD and DO|
All boards of certification now require that medical practitioners demonstrate, by examination, continuing mastery of the core knowledge and skills for a chosen specialty. Recertification varies by particular specialty between every seven and every ten years.
In the United States there are hierarchies of medical specialties in the cities of a region. Small towns and cities have primary care, middle sized cities offer secondary care, and metropolitan cities have tertiary care. Income, size of population, population demographics, distance to the doctor, all influence the numbers and kinds of specialists and physicians located in a city. 
A population's income level determines whether sufficient physicians can practice in an area and whether public subsidy is needed to maintain the health of the population. Developing countries and poor areas usually have shortages of physicians and specialties, and those in practice usually locate in larger cities. For some underlying theory regarding physician location, see central place theory. 
The proportion of men and women in different medical specialties varies greatly. Such sex segregation is largely due to differential application. 
A survey of physicians in the United States came to the result that dermatologists are most satisfied with their choice of specialty followed by radiologists, oncologists, plastic surgeons, and gastroenterologists.  In contrast, primary care physicians were the least satisfied, followed by nephrologists, obstetricians/gynecologists, and pulmonologists.  Surveys have also revealed high levels of depression among medical students (25 - 30%) as well as among physicians in training (22 - 43%), which for many specialties, continue into regular practice.   A UK survey conducted of cancer-related specialties in 1994 and 2002 found higher job satisfaction in those specialties with more patient contact. Rates of burnout also varied by specialty. 
Interdisciplinary sub-specialties of medicine, including
- Occupational medicine – branch of clinical medicine that provides health advice to organizations and individuals concerning work-related health and safety issues and standards. See occupational safety and health.
- Disaster medicine – branch of medicine that provides healthcare services to disaster survivors; guides medically related disaster preparation, disaster planning, disaster response and disaster recovery throughout the disaster life cycle and serves as a liaison between and partner to the medical contingency planner, the emergency management professional, the incident command system, government and policy makers.
- Preventive medicine – part of medicine engaged with preventing disease rather than curing it. It can be contrasted not only with curative medicine, but also with public health methods (which work at the level of population health rather than individual health).
- Medical genetics – the application of genetics to medicine. Medical genetics is a broad and varied field. It encompasses many different individual fields, including clinical genetics, biochemical genetics, cytogenetics, molecular genetics, the genetics of common diseases (such as neural tube defects), and genetic counseling.
- Specialty Registrar
- Federation of National Specialty Societies of Canada
- Society of General Internal Medicine
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- Error: Bad DOI specified!
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- Rotenstein, Lisa S.; Ramos, Marco A.; Torre, Matthew; Segal, J. Bradley; Peluso, Michael J.; Guille, Constance; Sen, Srijan; Mata, Douglas A. (2016-12-06). "Prevalence of Depression, Depressive Symptoms, and Suicidal Ideation Among Medical Students: A Systematic Review and Meta-Analysis". JAMA. 316 (21): 2214–2236. doi: 10.1001/jama.2016.17324. ISSN 1538-3598. PMID 27923088.
- Douglas A. Mata, Marco A. Ramos, Narinder Bansal, Rida Khan, Constance Guille, Emanuele Di Angelantonio & Srijan Sen (2015). "Prevalence of Depression and Depressive Symptoms Among Resident Physicians: A Systematic Review and Meta-analysis". JAMA. 314 (22): 2373–2383. doi: 10.1001/jama.2015.15845. PMC 4866499. PMID 26647259.CS1 maint: Multiple names: authors list ( link)
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