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Internist, Endocrinologist (diabetes, hormones)
26 years of experience
Video profile
License & Identifications

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).

Patient Reviews

Patient comments (8)

The overall average patient rating of Dr. John Merendino is Good. Dr. Merendino has been reviewed by 22 patients who have provided 8 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.1
Promptness 3.3
Courteous Staff 3.8
Accurate Diagnosis 3.9
Bedside Manner 3.3
Spends Time with Me 3.6
Follows Up After Visit 2.8

Specialties & Research

Dr. John Merendino, MD is board certified in Internal Medicine and Endocrinology, Diabetes & Metabolism.

  • He has special expertise in 7 areas:
  • Cholesterol Management
  • Diabetes
  • Diabetes Mellitus
  • Diabetes
  • Pituitary Diseases
  • Weight Loss
  • Weight loss (non-surgical)

Education & Awards

Dr. Merendino graduated from Yale University, New Haven. He has 2 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)
Patients' Choice Award (2008 - 2010)


Dr. Merendino has 4 hospital affiliations:

  • Suburban Hospital 
  • Holy Cross Hospital 


  • Italian

> > > > Dr. John Merendino, MD

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Additional Information
Dr. John Merendino MD is a male Internist, has 26 years of experience and practices in Internal Medicine and Endocrinology, Diabetes & Metabolism.
Where does Dr. John Merendino practice?
Dr. John Merendino has 2 office locations.
Dr. John Merendino practices Internal Medicine and Endocrinology, Diabetes & Metabolism near Bethesda, MD.
Additional practice locations include: Hagerstown, MD.
See Bethesda Internists and Bethesda Endocrinologists.