← CMS Doctors and Clinicians
JOHN M CALLAHAN, MD
INTERNAL MEDICINE · BUFFALO, NY
Provider
- NPI
1568454528- Credential
- MD
- Primary specialty
- INTERNAL MEDICINE
- Secondary specialties
- HOSPITALIST
- Gender
- Male
- Medical school
- STATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
- Graduation year
- 1986
Practice
- Address
- —, BUFFALO, NY 14202
- Phone
- 7168931010
- Accepts Medicare
- Yes (individual)
- Telehealth
- No
Source
- Authoritative
- NPI Registry
- Machine
- JSON-LD · Markdown