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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 (1)

The overall average patient rating of Dr. Mario Diaz is Excellent. Dr. Diaz has been reviewed by 2 patients who have provided 1 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Mario Diaz, MD is board certified in Surgery.

Education & Awards

Dr. Diaz graduated from Instituto Politecnico Nacional, Mexico.


Dr. Diaz has 5 hospital affiliations:

  • Anne Arundel Medical Center 
  • Shady Grove Adventist Hosp 


  • Spanish

> > > > Dr. Mario Diaz, MD

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Additional Information
Dr. Mario Humberto Diaz MD is a male Surgeon, has 42 years of experience and practices in Surgery.
Where does Dr. Mario H. Diaz practice?
Dr. Mario Diaz has 3 office locations.
Dr. Mario Diaz practices Surgery near Annapolis, MD.
Additional practice locations include: Germantown, MD.
See Annapolis Surgeons.