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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. Lawrence Mass:

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Education & Awards

Dr. Mass graduated from University of Illinois at Chicago.


Dr. Mass has 4 hospital affiliations:

  • Beth Israel Medical Center Petrie Division 
  • St. Luke's Roosevelt Hospital/St. Luke's Hospital Division 

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Additional Information
Dr. Lawrence David Mass MD is a male Internist, has 38 years of experience and practices in Addiction Medicine.
Where does Dr. Lawrence D. Mass practice?
Dr. Lawrence Mass has 2 office locations.
Dr. Lawrence Mass practices Addiction Medicine near New York, NY.
See New York Addiction Specialists.