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).
Learn more about Dr. Mark Clark:
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Specialties & Research
Dr. Mark Clark, MD is board certified in Family Medicine and Family Medicine - Geriatric Medicine.
- He has special expertise in 2 areas:
- Diabetes Complications
Education & Awards
Dr. Clark graduated from Thomas Jefferson University, Philadelphia.
Dr. Clark has 4 hospital affiliations:
- Piedmont Hospital
- Henry Medical Center Inc