Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. William J. A. O'Brien, PSYD

Individual provider Psychologist · NPI 1255740254

Dr. William J. A. O'Brien, PSYD is a Clinical Psychologist in Westborough, Massachusetts. Qualified in 2010, 16 years ago. Accepts Medicare assignment.

Years since qualifying
16
In the registry since
2014
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

288 Lyman St Second Fl
Westborough, MA 01581-2633
Phone: (508) 475-2626
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X

Record details

NPI number1255740254
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorNo
NPI enumeratedAugust 5, 2014
Last updated in NPPESAugust 5, 2014

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Westborough