"M.D." stands for "Medical Doctor", which refers to a physician who has completed medical school and obtained a degree in medicine. There are a few synonyms that can be used interchangeably with "M.D." such as "doctor of medicine", "physician", "medical practitioner", "healthcare professional" and "clinician". These synonyms are commonly used in medical circles and provide alternatives to the term "M.D.". Each of these terms describes a medical professional with expertise in treating, diagnosing and preventing disease, and in managing a range of health concerns. Regardless of which synonym used, all of them refer to highly trained medical experts committed to the best healthcare practices and patient care.