Margaret O'Brien, LMHC
NPI 1891246518 · Mental Health Counselor · Arlington, MA
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret O'Brien, LMHC is a Mental Health Counselor provider in Arlington, MA (NPI 1891246518).
Provider details
- NPI number
- 1891246518
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LMHC
- Sex
- Female
- Sole proprietor
- Yes
- License
- LMHC11198 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 22 Pleasant StSuite 2000Malden, MA 02148-5119Phone: (781) 851-2648
Registry dates
- Enumerated
- 2016-10-18
- Last updated
- 2024-07-19
- Certified
- 2024-07-19
Frequently asked questions
- What is Margaret O'Brien's NPI number?
- Margaret O'Brien's National Provider Identifier (NPI) is 1891246518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret O'Brien's specialty?
- Margaret O'Brien is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Margaret O'Brien located?
- Margaret O'Brien's practice location on file with NPPES is 406 Massachusetts Ave, Arlington, MA 02474-6700.
- What is Margaret O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Margaret O'Brien is (781) 488-8243.
- Does Margaret O'Brien accept Medicare?
- Margaret O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret O'Brien's NPI active?
- Yes — Margaret O'Brien's NPI (1891246518) is active in the NPPES registry as of the last update on 2024-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.