Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Lawrence David Mass, MD

Individual provider Addiction Medicine (Internal Medicine) Physician · NPI 1609090349

Dr. Lawrence David Mass, MD is an Addiction Medicine (Internal Medicine) Physician in New York, New York. Licensed in New York. Registered with an NPI since 2007.

Licensed in
NY
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

435 2nd Ave
New York, NY 10010-3101
Phone: (212) 726-6823
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction Medicine (Internal Medicine) Physician (primary) Taxonomy 207RA0401X · Licence 127475 (NY)

Record details

NPI number1609090349
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 12, 2007
Last updated in NPPESDecember 3, 2012

Other providers in New York