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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Specialties & Research
Dr. Katherine O'Brien, MD is board certified in Pediatrics.
- She has special expertise in 3 areas:
- HIV Infections
- Pneumococcal Pneumonia
- Strep Infection (Streptococcal Infections)
Education & Awards
Dr. O'Brien graduated from McGill University Faculty Of Medicine, Montreal. She has 1 awards.
Dr. O'Brien has 3 hospital affiliations:
- Howard County General Hospital
- The Johns Hopkins Hospital
- Johns Hopkins Geriatrics Center