IndividualActive
Catherine Duffy
NPI 1336333061 · Social Worker · Chelsea, MA
Catherine Duffy is a Social Worker provider in Chelsea, MA (NPI 1336333061).
Provider details
- NPI number
- 1336333061
- 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
Detailed profile(82/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
301 Broadway
Chelsea, MA 02150-2807
Phone: (617) 912-7968
Fax: (617) 569-7890
Street-level locationGet directions
Mailing address
20a Carr Rd
Saugus, MA 01906-2868
Registry dates
- Enumerated
- 2007-09-06
- Last updated
- 2007-09-21
Frequently asked questions
- What is Catherine Duffy's NPI number?
- Catherine Duffy's National Provider Identifier (NPI) is 1336333061, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Duffy's specialty?
- Catherine Duffy is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Catherine Duffy located?
- Catherine Duffy's practice location on file with NPPES is 301 Broadway, Chelsea, MA 02150-2807.
- What is Catherine Duffy's phone number?
- The practice phone number listed in the NPPES registry for Catherine Duffy is (617) 912-7968.
- Is Catherine Duffy's NPI active?
- Yes — Catherine Duffy's NPI (1336333061) is active in the NPPES registry as of the last update on 2007-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.