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

David O Greenleaf, PHD

Individual provider Clinical Psychologist · NPI 1275572430

David O Greenleaf, PHD is a Clinical Psychologist in Belmont, Massachusetts. Qualified in 1985, 41 years ago. Accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
41
Licensed in
MA
In the registry since
2006
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

115 Mill St
Belmont, MA 02478-1041
Phone: (617) 855-2681
Fax: (617) 855-3722
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 3944 (MA)

Record details

NPI number1275572430
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJune 5, 2006
Last updated in NPPESJuly 13, 2026
Mailing address115 Mill St, Belmont, MA 02478-1041

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1985 (41 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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