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

Dr. James Mark Greenblatt, MD

Individual provider Psychiatry Physician · NPI 1790817575

Dr. James Mark Greenblatt, MD is a Psychiatry Physician in Waltham, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

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

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Practice location Address checks out

9 Hope Ave Ste 500 Walden Behavioral Care
Waltham, MA 02453-2751
Phone: (781) 647-0066
Fax: (781) 899-4905
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 70333 (MA)

Record details

NPI number1790817575
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 9, 2007
Last updated in NPPESMarch 16, 2016
Mailing address9 Hope Ave, Ste 500, Waltham, MA 02453-2751

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