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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 (2)

The overall average patient rating of Dr. Leo Cass is Excellent. Dr. Cass has been reviewed by 6 patients who have provided 2 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.7
Promptness 4.3
Courteous Staff 4.5
Accurate Diagnosis 4.2
Bedside Manner 4.2
Spends Time with Me 4.7
Follows Up After Visit 4.2

Specialties & Research

Dr. Leo Cass, MD is board certified in Internal Medicine.

Education & Awards

Dr. Cass graduated from McGill University Faculty Of Medicine, Montreal. He has 2 awards.

Bridges to Excellence Recognition
Physician Office Systems Recognition (2015 - 2017)
Level III
NCQA Physician Practice Connections - Patient Centered Medical Home (2015 - 2018)


Dr. Cass has 3 hospital affiliations:

  • Winchester Hospital 
  • Aberjona Nursing Center, Inc. 
  • Winchester Nursing Center 


  • English

> > > > Dr. Leo Cass, MD

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Additional Information
Dr. Leo Maxwell Cass MD is a male Internist, has 42 years of experience and practices in Internal Medicine.
Where does Dr. Leo M. Cass practice?
Dr. Leo Cass has 1 office location.
Dr. Leo Cass practices Internal Medicine near Woburn, MA.
See Woburn Internists.