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

MS. Margaret Lynn O'Brien, MA, JD

Individual provider Mental Health Counselor · NPI 1205972387

MS. Margaret Lynn O'Brien, MA, JD is a Mental Health Counselor in Tewksbury, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2007.

Licensed in
MA
In the registry since
2007
What do these letters mean?
MA — Master of Arts
A graduate arts degree.

See every abbreviation used in this directory →

Practice location Address checks out

365 E St
Tewksbury, MA 01876-1950
Phone: (978) 851-0790
Fax: (978) 851-5218
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 5146 (MA)

Record details

NPI number1205972387
Entity typeIndividual (Type 1)
GenderFemale
Credentials MA , JD
Sole proprietorNo
NPI enumeratedJanuary 29, 2007
Last updated in NPPESJuly 8, 2007

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