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

Alexander Thomas O'Brien, PMHNP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1598420770

Alexander Thomas O'Brien, PMHNP is a Psychiatric/Mental Health Nurse Practitioner in Chestnut Hill, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2021.

Licensed in
MA
In the registry since
2021
What do these letters mean?
PMHNP — Psychiatric-Mental Health Nurse Practitioner
A nurse practitioner specialising in mental health, able to prescribe psychiatric medication.

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Practice location Address checks out

300 S St
Chestnut Hill, MA 02467-3694
Phone: (617) 469-0300
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 234518 (MA)

Record details

NPI number1598420770
Entity typeIndividual (Type 1)
GenderMale
Credentials PMHNP
Sole proprietorNo
NPI enumeratedNovember 3, 2021
Last updated in NPPESMarch 13, 2023
Certification dateMarch 13, 2023

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