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

Marshall Nathan Lassman, MD

Individual provider Internal Medicine Physician · NPI 1629040357

Marshall Nathan Lassman, MD is an Internal Medicine Physician in Hartford, Connecticut. Licensed in Connecticut. Registered with an NPI since 2006.

Licensed in
CT
In the registry since
2006
Specialties on file
3
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

1000 Asylum Ave Ste 4310
Hartford, CT 06105-1770
Phone: (860) 247-2137
Fax: (860) 728-0480
Show map & directions

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

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 0015106 (CT)
Internal Medicine Physician Taxonomy 207R00000X · Licence 015106 (CT)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence 015106 (CT)

Record details

NPI number1629040357
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 6, 2006
Last updated in NPPESMarch 7, 2023

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