The abbreviation MD MCH after a doctor's name means medical doctor, master of surgery. All licensed medical doctors have the credential MD, separating them from PhDs, which are another type of doctor. The MCH credential, often written as M.Ch., denotes that the doctor is a specialist.
The acronym for the surgical specialty comes from the term Magister Chirurgiae, which means master of surgery. The credential might also be listed as MS, CM, or ChM. Physicians who hold the credential specialized in a specific surgical element, or in surgery in general, during medical school and completed surgical rotations as part of their internship.