A doctor who provides primary care across multiple medical fields, as opposed to a specialist. Often contrasted with 一般開業医, which may not imply the same breadth of practice.
See also: 一般開業医
He contributes to community medicine as a general practitioner.
全科開業医は幅広い診療に対応できる。
A general practitioner can handle a wide range of medical care.
一般開業医 is a more common term for a general practitioner in private practice, while 全科開業医 explicitly emphasizes practice across all medical departments.
Compound of 全科 (all departments) + 開業医 (practicing physician). The exact historical derivation is uncertain, but the term is used in modern medical contexts to describe a general practitioner.