In the United States and Canada, an attending physician (also known as a staff physician or supervising physician) is a physician (usually an M.D., or D.O. or D.P.M. in the United States) who has completed residency and practices medicine in a clinic or hospital, in the specialty learned during residency.^[1] An attending physician typically supervises^[2] fellows, residents, and medical students. Attending physicians may also maintain professorships at an affiliated medical school.^[2] This is common if the supervision of trainees is a significant part of the physician's work. Attending physicians have final responsibility, legally and otherwise, for patient care, even when many of the minute-to-minute decisions are being made by house officers (residents) or non-physician health-care providers (i.e. physician assistants and nurse practitioners).^[3] Attending physicians are sometimes the 'rendering physician' listed on the patient's official medical record, but if they are overseeing a resident or another staff member, they are 'supervising.'

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The term "attending physician" or "attending" also refers to the formal relationship of a hospitalized patient and their primary medic during the hospitalization, as opposed to ancillary physicians assisting the primary care physician. ^{[citation needed]} However, even on a consultation service, at an academic center, the physician who has finished his or her training is called the attending or consultant,^[4] as opposed to a resident physician.

Attending physicians may also still be in training, such as a fellow in a subspecialty. For example, a cardiology fellow may function as an internal medicine attending, as they have already finished residency in internal medicine. The term is used more commonly in teaching hospitals. In non-teaching hospitals, essentially all physicians function as attendings in some respects after completing residency.

• Consultant (medicine) (equivalent title in the United Kingdom and Commonwealth)
• Attending physician statement