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

Mary E O'Brien

Individual provider Mental Health Counselor · NPI 1275839433

Mary E O'Brien is a Mental Health Counselor in Lexington, Massachusetts. Registered with an NPI since 2011.

In the registry since
2011

Practice location Address checks out

1040 Waltham St
Lexington, MA 02421-8033
Phone: (781) 761-5089
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X

Record details

NPI number1275839433
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedFebruary 7, 2011
Last updated in NPPESJune 13, 2016
Mailing address1040 Waltham St, Lexington, MA 02421-8033

Other providers in Lexington