Diagnosis and medical treatment rest on years of training. A physician is a professional who has completed medical school and postgraduate training and is licensed to practice medicine—diagnosing illness, prescribing treatment, and coordinating care.

Physicians may be generalists or specialists. They integrate history, examination, and test results into clinical judgments and take responsibility for the overall medical plan. Ethical duties include beneficence, non-maleficence, confidentiality, and respect for autonomy. Continuing education keeps knowledge current.

Team-based care means physicians work closely with nurses, therapists, and other professionals. The quality of the physician–patient relationship influences trust, adherence, and satisfaction. Licensing and specialty certification protect the public by setting minimum standards of competence.

• Licensed medical doctor who diagnoses and treats illness
• May practice as generalist or specialist
• Holds ethical and legal responsibility for medical decisions
• Works within interdisciplinary care teams