Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Michael Peter Koumjian, MD

Individual provider Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · NPI 1366403321

Dr. Michael Peter Koumjian, MD is a Cardiac Surgery in LA Mesa, California. Graduated from Rutgers New Jersey Medical School in 1977, 49 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
49
Trained at
Rutgers New Jersey Medical School
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

5525 Grossmont Center Dr Ste 609
LA Mesa, CA 91942
Phone: (619) 466-5700
Fax: (619) 460-8975
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (primary) Taxonomy 208G00000X · Licence G37886 (CA)

Record details

NPI number1366403321
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 30, 2006
Last updated in NPPESFebruary 2, 2018
Mailing address5525 Grossmont Center Dr Ste 609, La Mesa, CA 91942-3009

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIAC SURGERY
Also practisesTHORACIC SURGERY, VASCULAR SURGERY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1977 (49 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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