Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Anthony W Posuniak, FNP-BC
Nurse Practitioner in Bangor, ME · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1437723764
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Registry record
Entity type Individual (Type 1)
Name Anthony W Posuniak
Credential FNP-BC
Sex Male
Practice address 543 Broadway, Bangor, ME, 04401
Phone (207) 922-1300
Enumeration date May 20, 2021
Last updated in NPPES Nov 17, 2023
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CNP211223 (ME) Primary
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
What specialty is Anthony Posuniak?
Anthony Posuniak is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-17.