Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Erin Elizabeth Mcniff
Physician Assistant in Boston, MA · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1376991497
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Registry record
Entity type Individual (Type 1)
Name Erin Elizabeth Mcniff
Sex Female
Practice address 53 State St, Boston, MA, 02109
Phone (888) 663-6331
Fax (415) 252-7176
Enumeration date May 31, 2016
Last updated in NPPES Mar 17, 2025
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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Erin Mcniff?
Erin Mcniff is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-17.