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 (2)

The overall average patient rating of Dr. Mariana Koczywas is Good. Dr. Koczywas has been reviewed by 5 patients who have provided 2 comments. The rating is 3.5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 3.0
Accurate Diagnosis 3.0
Bedside Manner 3.0
Spends Time with Me 3.0
Follows Up After Visit 3.0

Specialties & Research

  • She has special expertise in 2 areas:
  • Cancer
  • 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 - 2015)
Castle Connolly America's Top Doctors® for Cancer (2007, 2009 - 2012, 2014 - 2015)


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

Similar doctors nearby

Dr. Dongmei Wang

Internal Medicine
18 years experience
Montebello, CA

Dr. Ravin Rupani

Internal Medicine
8 years experience
Montebello, CA

Dr. Jaw Wang

50 years experience
Montebello, CA

Dr. Manan Mehta

Montebello, CA

Dr. John Thropay

Radiation Oncology
36 years experience
Montebello, CA

Dr. Tse Chang

Internal Medicine
47 years experience
Montebello, CA
Search All Similar Doctors
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 4 office locations.
Dr. Mariana Koczywas practices Medical Oncology near Montebello, CA.
Additional practice locations include: Duarte, CA and Lancaster, CA.
See Montebello Oncologists.