Anne Williamson
NPI 1306516679 · Social Worker · Chelsea, MA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anne Williamson is a Social Worker provider in Chelsea, MA (NPI 1306516679).
Provider details
- NPI number
- 1306516679
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
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
83% 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
- 2021-09-17
- Last updated
- 2021-09-17
- Certified
- 2021-09-17
Frequently asked questions
- What is Anne Williamson's NPI number?
- Anne Williamson's National Provider Identifier (NPI) is 1306516679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anne Williamson's specialty?
- Anne Williamson is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Anne Williamson located?
- Anne Williamson's practice location on file with NPPES is 301 Broadway, Chelsea, MA 02150-2807.
- What is Anne Williamson's phone number?
- The practice phone number listed in the NPPES registry for Anne Williamson is (617) 889-4860.
- Does Anne Williamson accept Medicare?
- Anne Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anne Williamson's NPI active?
- Yes — Anne Williamson's NPI (1306516679) is active in the NPPES registry as of the last update on 2021-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.