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. Chang-Gyu Hahn:
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- Currently 4 of 4 stars
The overall average patient rating of Dr. Chang-Gyu Hahn is Excellent.
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Education & Awards
Dr. Hahn graduated from Seoul National University.
Dr. Hahn has 5 hospital affiliations:
- Hospital of the University of PA
- University of PA Medical Center/Presbyterian
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- Additional Information
- Where does Dr. Chang-Gyu G. Hahn practice?
Dr. Chang-Gyu Hahn practices Psychiatry near Philadelphia, PA.
See Philadelphia Psychiatrists.