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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 (6)

The overall average patient rating of Dr. Mark Kassis is Average. Dr. Kassis has been reviewed by 12 patients who have provided 6 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 3.2
Promptness 3.7
Courteous Staff 3.2
Accurate Diagnosis 2.9
Bedside Manner 3.2
Spends Time with Me 3.2
Follows Up After Visit 2.6

Specialties & Research

Dr. Mark Kassis, MD is board certified in Internal Medicine and Pediatrics.

  • He has special expertise in 5 areas:
  • Diabetes
  • Diabetes Complications
  • Heart Diseases
  • Heart Failure
  • Stroke

Education & Awards

Dr. Kassis graduated from Stony Brook University. He has 2 awards.

Bridges to Excellence Recognition
Bridges to Excellence Medical Home Recognition (2015 - 2018)
Level III
NCQA Physician Practice Connections - Patient Centered Medical Home (2015 - 2018)


Dr. Kassis has 8 hospital affiliations:

  • Baystate Medical Center 
  • Mercy Medical Center 


  • Polish
  • Portuguese
  • Vietnamese
  • Chinese
  • Spanish

> > > > Dr. Mark Kassis, MD

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Additional Information
Dr. Mark S Kassis MD is a male Internist, has 27 years of experience and practices in Internal Medicine and Pediatrics.
Where does Dr. Mark S. Kassis practice?
Dr. Mark Kassis has 1 office location.
Dr. Mark Kassis practices Internal Medicine and Pediatrics near Westfield, MA.
See Westfield Internists and Westfield Pediatricians.