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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).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Eugene Ahn, Radiation Oncologist is Excellent. Dr. Ahn has been reviewed by 7 patients who have provided 3 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 4.6
Courteous Staff 4.6
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. Eugene Ahn, MD is board certified in Radiation Oncology.

  • He has special expertise in 3 areas:
  • Cancer
  • Head and Neck Cancer
  • Nervous System Cancer

Education & Awards

Dr. Ahn graduated from New York University. He has 3 awards.

Patients' Choice Award (2014)
Compassionate Doctor Recognition (2014)
On-Time Doctor Award (2014)


Dr. Ahn has 5 hospital affiliations:

  • Simi Valley Hospital 
  • Los Robles Hospital and Medical Center 


  • English

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Additional Information
Dr. Eugene S Ahn MD is a male Radiation Oncologist, has 13 years of experience and practices in Radiation Oncology.
Where does Dr. Eugene S. Ahn practice?
Dr. Eugene Ahn has 4 office locations.
Dr. Eugene Ahn practices Radiation Oncology near Westlake Village, CA.
Additional practice locations include: Thousand Oaks, CA and Ventura, CA.
See Westlake Village Radiologists.