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. Charles Callahan, DO is board certified in Pediatrics and Pediatric Pulmonology.
- He has special expertise in 3 areas:
- Acid Reflux Disease (Gastroesophageal Reflux / GERD)
Education & Awards
Dr. Callahan graduated from UMDNJ at Stratford.
Dr. Callahan has 1 hospital affiliations:
- Walter Reed Army Medical Center
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- Additional Information
- Dr. Charles Willis Callahan DO is a male Pediatrician, has 27 years of experience and practices in Pediatrics and Pediatric Pulmonology.
- Where does Dr. Charles W. Callahan practice?
- Dr. Charles Callahan has 1 office location.
Dr. Charles Callahan practices Pediatrics and Pediatric Pulmonology near Silver Spring, MD.
See Silver Spring Pediatricians and Silver Spring Pulmonologists.