Browse Health
Family Practitioner, Primary Care Doctor
33 years of experience
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).

Learn more about Dr. Greg Maddex:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. Greg Maddex is Good. Dr. Maddex has been reviewed by 21 patients who have provided 5 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.8
Promptness 4.3
Courteous Staff 4.3
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 4.3

Education & Awards

Dr. Maddex graduated from Michigan State University College of Osteopathic Medicine, East Lansing.


Dr. Maddex has 3 hospital affiliations:

  • San Antonio Community Hospital 
  • Doctors Hospital of West Covina 
  • Western Med Ctr Santa Ana 


  • Spanish

Similar doctors nearby

Dr. David Hsieh

Family Medicine
35 years experience
Diamond Bar, CA

Dr. Phillip Wunder

Family Medicine
30 years experience
Diamond Bar, CA

Dr. Cho-Han Cheng

Family Medicine
16 years experience
Diamond Bar, CA

Dr. Yann Pan

Family Medicine
8 years experience
Diamond Bar, CA

Dr. Ferdinand Vansteen

Family Medicine
25 years experience
Diamond Bar, CA

Dr. Cathy Tong

Family Medicine
5 years experience
Diamond Bar, CA
Search All Similar Doctors
Additional Information
Dr. Greg Robert Maddex DO is a male Family Practitioner, has 33 years of experience and practices in Family Medicine.
Where does Dr. Greg R. Maddex practice?
Dr. Greg Maddex has 1 office location.
Dr. Greg Maddex practices Family Medicine near Diamond Bar, CA.
See Diamond Bar Family Physicians.