The primary purpose of is to facilitate diagnosis, treatment and patient care

The primary purpose of physicians is to facilitate diagnosis, treatment and patient care.

Explanation:

Healthcare professionals, specifically physicians, are the group of professionals who are trained and certified to evaluate a patient, make a diagnosis, indicate a treatment and provide the care required, which is their primary purpose.

Physicians may be primary care or specialists, the latter requiring additional years of study to acquire the specialty.

Diagnosis and treatment can and should only be done by the physician, while health care can be done by any other health professional.