4.6
10 Ratings with 4 written Reviews

Overview based on verified provider data
![]() | ![]() | ![]() | ![]() |
| Dr. Michael Peter Koumjian, MD | Dr. Yuan Hwang Lin, MD | Dr. Mark Yeager, MD | Dr. Courtney Weber |
| Thoracic Surgery | Cardiology | Cardiology | Thoracic Surgery |
| Accepts New Patients | |||
| 49 Years of Experience | 50 Years of Experience | 47 Years of Experience | 9 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option |
| Speaks English, Spanish | Speaks Chinese, English | ||
| La Mesa , CA | Escondido , CA | La Jolla , CA | La Jolla , CA |
| Med School: Rutgers New Jersey Medical School | Med School: Taipei Medical University | Med School: Yale University School Of Medicine | Med School: University Of California San Diego School Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Dr. Michael Peter Koumjian holds an expired medical license in the state of California.
| Position | State | Year | Status |
|---|---|---|---|
| Medical Doctor | California | 2026 | Expired |
Completed their residency at United States Naval Medical Center.
Graduated from Rutgers New Jersey Medical School in 1977.
Dr. Koumjian's NPI number is 1366403321.










This provider profile is built using data from:
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.