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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).

Learn more about Dr. Mariana Koczywas:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Mariana Koczywas is Excellent. Dr. Koczywas has been reviewed by 4 patients who have provided 2 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 4.0
Promptness 4.0
Courteous Staff 2.5
Accurate Diagnosis 2.5
Bedside Manner 2.5
Spends Time with Me 2.5
Follows Up After Visit 2.5

Specialties & Research

  • She has special expertise in 1 area:
  • Lung Cancer

Education & Awards

Dr. Koczywas graduated from Akademia Medyczna, Lodz. She has 3 awards.

1974 - 1978, Graduated with honors in top 5% of class
Castle Connolly America's Top Doctors® (2010 - 2014)
Castle Connolly America's Top Doctors® for Cancer (2007, 2009 - 2012, 2014)


Dr. Koczywas has 3 hospital affiliations:

  • San Gabriel Valley Medical Center 
  • Beverly Hospital 
  • City of Hope National Medical Center 


  • Polish
  • Russian

> > > > Dr. Mariana Koczywas, MD

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Additional Information
Dr. Mariana Koczywas MD is a female Oncologist , has 27 years of experience and practices in Medical Oncology.
Where does Dr. Mariana Koczywas practice?
Dr. Mariana Koczywas has 1 office location.
Dr. Mariana Koczywas practices Medical Oncology near Duarte, CA.
See Duarte Oncologists.