Margaret Matthews, LCSW
NPI 1811666340 · Clinical Social Worker · Portland, ME
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Matthews, LCSW is a Clinical Social Worker provider in Portland, ME (NPI 1811666340).
Provider details
- NPI number
- 1811666340
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- LC23146 (ME)
Specialties & taxonomies
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
4 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 Station Ave Ste 101Brunswick, ME 04011-2092Phone: (207) 373-6848Fax: (207) 618-5680
Registry dates
- Enumerated
- 2021-09-08
- Last updated
- 2026-01-20
- Certified
- 2026-01-20
Frequently asked questions
- What is Margaret Matthews's NPI number?
- Margaret Matthews's National Provider Identifier (NPI) is 1811666340, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Matthews's specialty?
- Margaret Matthews is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Margaret Matthews located?
- Margaret Matthews's practice location on file with NPPES is 901 Washington Ave Ste 100, Portland, ME 04103-2842.
- What is Margaret Matthews's phone number?
- The practice phone number listed in the NPPES registry for Margaret Matthews is (207) 871-1200.
- Does Margaret Matthews accept Medicare?
- Margaret Matthews is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Matthews's NPI active?
- Yes — Margaret Matthews's NPI (1811666340) is active in the NPPES registry as of the last update on 2026-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.