A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).
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- Currently 3 of 4 stars
The overall average patient rating of Dr. William Mark, Gastroenterologist is Good.
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Specialties & Research
Dr. William Mark, MD is board certified in Internal Medicine and Gastroenterology.
- He has special expertise in 1 area:
- Women's Health
Education & Awards
Dr. Mark graduated from University of Guadalajara, Mexico, San Antonio.
Dr. Mark has 3 hospital affiliations:
- Sacred Heart Hospital
- Memorial Hospital Med Center-Cumberland
- Western Maryland Regional Medical Center