Rosemary Mason, LCSW
NPI 1669768800 · Clinical Social Worker · Portland, ME
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rosemary Mason, LCSW is a Clinical Social Worker provider in Portland, ME (NPI 1669768800).
Provider details
- NPI number
- 1669768800
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- LC1137 (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
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2011-06-27
- Last updated
- 2015-01-23
Frequently asked questions
- What is Rosemary Mason's NPI number?
- Rosemary Mason's National Provider Identifier (NPI) is 1669768800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rosemary Mason's specialty?
- Rosemary Mason is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Rosemary Mason located?
- Rosemary Mason's practice location on file with NPPES is 165 Lancaster St, Portland, ME 04101-2406.
- What is Rosemary Mason's phone number?
- The practice phone number listed in the NPPES registry for Rosemary Mason is (207) 874-1030.
- Does Rosemary Mason accept Medicare?
- Rosemary Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rosemary Mason's NPI active?
- Yes — Rosemary Mason's NPI (1669768800) is active in the NPPES registry as of the last update on 2015-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.