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Internist, Family Practitioner, Ophthalmologist
19 years of experience
Video profile
Accepting new patients
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

  • Currently 3.5 of 4 stars
Patient comments (12)

The overall average patient rating of Dr. Gregory Katz, Internist, Family Practitioner, Ophthalmologist is Excellent. Dr. Katz has been reviewed by 15 patients who have provided 12 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 2.3
  • Currently 2.3076923076923 of 4 stars
Promptness 3.1
  • Currently 3.0769230769231 of 4 stars
Courteous Staff 2.9
  • Currently 2.9230769230769 of 4 stars
Accurate Diagnosis 3.5
  • Currently 3.5384615384615 of 4 stars
Bedside Manner 3.6
  • Currently 3.6153846153846 of 4 stars
Spends Time with Me 3.3
  • Currently 3.3076923076923 of 4 stars
Follows Up After Visit 3.3
  • Currently 3.3076923076923 of 4 stars

Specialties & Research

Dr. Gregory Katz, MD is board certified in Internal Medicine.

  • He has special expertise in 3 areas:
  • Glaucoma
  • Weight Loss
  • Weight loss (non-surgical)

Education & Awards

Dr. Katz graduated from Yeshiva University, Bronx. He has 2 awards.

Patients' Choice Award (2009 - 2010, 2012, 2014)
Compassionate Doctor Recognition (2010, 2012)


Dr. Katz has 6 hospital affiliations:

  • Hoag Memorial Hospital Presbyterian 
  • Providence Hospital and Medical Center 

> > > > Dr. Gregory Katz, MD

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Additional Information
Dr. Gregory Katz MD is a male Family Practitioner, has 19 years of experience and practices in Internal Medicine and Family Medicine.
Where does Dr. Gregory Katz practice?
Dr. Gregory Katz has 5 office locations.
Dr. Gregory Katz practices Internal Medicine and Family Medicine near Newport Beach, CA.
Additional practice locations include: Ypsilanti, MI and Livonia, MI.
See Newport Beach Internists and Newport Beach Primary Care Doctors.