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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 (7)

The overall average patient rating of Dr. John Barstis is Excellent. Dr. Barstis has been reviewed by 21 patients who have provided 7 comments. The rating is 5 out of 5 stars.

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

Specialties & Research

Dr. John Barstis, DO, MD is board certified in Medical Oncology.

  • He has special expertise in 5 areas:
  • Breast Cancer
  • Cancer
  • Chemotherapy
  • Lymphoma
  • Palliative Care

Education & Awards

Dr. Barstis graduated from State University of New York at Buffalo. He has 6 awards.

Patients' Choice 5th Anniversary Award (2012)
Patients' Choice Award (2008 - 2012, 2014)
Compassionate Doctor Recognition (2010 - 2014)
Top 10 Doctor - Metro Area (2014)
Los Angeles Metro Area
Medical Oncologist
Top 10 Doctor - State (2014)
Medical Oncologist
On-Time Doctor Award (2014)


Dr. Barstis has 13 hospital affiliations:

  • Centinela Hospital Medical Center 
  • Henry Mayo Newhall Memorial Hospital 


  • Spanish
  • English

> > > > Dr. John Barstis, DO, MD

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Additional Information
Dr. John L Barstis DO and MD is a male Oncologist , has 35 years of experience and practices in Medical Oncology.
Where does Dr. John L. Barstis practice?
Dr. John Barstis has 1 office location.
Dr. John Barstis practices Medical Oncology near Valencia, CA.
See Valencia Oncologists.