What does the abbreviation MD stand for?

The abbreviation MD stands for Medical Doctor. This designation is used internationally and is critical in the healthcare field, signifying a professional who has completed medical school and is licensed to practice medicine. Medical doctors are trained to diagnose and treat illnesses, perform surgeries, and provide patient care across various medical specialties.

Understanding the significance of this abbreviation is essential in healthcare settings, where clarity on the qualifications of professionals is crucial for patient safety and effective care delivery. The other options do not represent recognized medical credentials or roles in the healthcare system, making "Medical Doctor" the accurate and widely accepted answer.