Primary Care Doctor, Family Practitioner, General Practitioner
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).

Patient Reviews

Patient comments (4)

The overall average patient rating of Dr. Mary Koumas is Excellent. Dr. Koumas has been reviewed by 12 patients who have provided 4 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.7
Promptness 2.7
Courteous Staff 4.0
Accurate Diagnosis 4.9
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 4.7

Specialties & Research

  • She has special expertise in 1 area:
  • Flu (Human Influenza)

Education & Awards

Dr. Koumas graduated from A.T. Still University - Kirksville. She has 2 awards.

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


Dr. Koumas has 15 hospital affiliations:

  • Saddleback Memorial Medical Center-Laguna Hills 
  • South Coast Medical Center/Adventist Health 


  • Spanish

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Additional Information
Dr. Mary M Koumas DO is a female Family Practitioner, has 33 years of experience and practices in Family Medicine and General Practice.
Where does Dr. Mary M. Koumas practice?
Dr. Mary Koumas has 2 office locations.
Dr. Mary Koumas practices Family Medicine and General Practice near West Covina, CA.
Additional practice locations include: Lake Forest, CA.
See West Covina Primary Care Doctors.