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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. Sidney Marshak:

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  1. Qualifications
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Specialties & Research

  • He has special expertise in 1 area:
  • Flu (Human Influenza)

Education & Awards

Dr. Marshak graduated from University of California at Irvine.


Dr. Marshak has 23 hospital affiliations:

  • Garfield Medical Center 
  • Tri-City Regional Medical Center 


  • Spanish

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Additional Information
Dr. Sidney Marshak MD is a male Family Practitioner, has 49 years of experience and practices in Family Medicine and General Practice.
Where does Dr. Sidney Marshak practice?
Dr. Sidney Marshak has 1 office location.
Dr. Sidney Marshak practices Family Medicine and General Practice near Los Angeles, CA.
See Los Angeles Primary Care Doctors and Los Angeles General Practitioners.