Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mariah Rooney O'Brien, MSW, LCSW

Individual provider Mental Health Counselor · NPI 1730602095

Mariah Rooney O'Brien, MSW, LCSW is a Mental Health Counselor in Brookline, Massachusetts. Licensed in Massachusetts and Minnesota. Registered with an NPI since 2017.

Licensed in
MA, MN
In the registry since
2017
Specialties on file
2
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

1269 Beacon St
Brookline, MA 02446-5248
Phone: (617) 232-1303
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 222762 (MA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 25628 (MN)

Record details

NPI number1730602095
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSW , LCSW
Sole proprietorNo
NPI enumeratedJuly 19, 2017
Last updated in NPPESJuly 30, 2020
Certification dateJuly 30, 2020

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