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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).

Learn more about Dr. Gregory Katz:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

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 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 2.7
Promptness 3.8
Courteous Staff 3.6
Accurate Diagnosis 4.4
Bedside Manner 4.5
Spends Time with Me 4.1
Follows Up After Visit 4.1

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, 2014)


Dr. Katz has 4 hospital affiliations:

  • Hoag Memorial Hospital Presbyterian 
  • University of Michigan Health System 

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Additional Information
Dr. Gregory Katz MD is a male Family Practitioner, has 20 years of experience and practices in Family Medicine and Internal Medicine.
Where does Dr. Gregory Katz practice?
Dr. Gregory Katz has 1 office location.
Dr. Gregory Katz practices Family Medicine and Internal Medicine near Newport Beach, CA.
See Newport Beach Primary Care Doctors and Newport Beach Internists.