Related titles are "veterinarian", used for one who cures diseases in animals, and "biologist", used for one who studies the life sciences in general. But the term is correctly used only when applied to doctors.
In most jurisdictions nowadays, physicians need government permission to practise their profession. This is known as licensing in the United States, as colegiation in Spain, as men'kyo in Japan and as registration in Australia.
Titles for specialised physicians include:
- anesthesiologist
- cardiologist
- dermatologist
- family physician
- general practitioner
- gynaecologist and andrologist.
- internist
- neurologist
- obstetrician
- ophthalmologist
- pediatrician
- psychiatrist
- radiologist
- surgeon