Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Erin Elizabeth Duffy
Counselor in Gloucester, MA · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629558309
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Registry record
Entity type Individual (Type 1)
Name Erin Elizabeth Duffy
Sex Female
Practice address 3 Blackburn Ctr, Gloucester, MA, 01930
Phone (978) 283-7198
Enumeration date Aug 21, 2018
Last updated in NPPES Aug 21, 2018
Taxonomy & licenses
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Erin Duffy practice?
The practice location on file with NPPES is in Gloucester, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Erin Duffy?
The National Provider Identifier (NPI) for Erin Duffy is 1629558309, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-21.