Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Michael Nathan Metzmaker, PA-C
Physician Assistant in Boston, MA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1356866800
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Registry record
Entity type Individual (Type 1)
Name Michael Nathan Metzmaker
Credential PA-C
Sex Male
Practice address 36 1st Ave, Boston, MA, 02129
Phone (617) 724-4499
Enumeration date Aug 6, 2017
Last updated in NPPES Aug 6, 2017
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
What specialty is Michael Metzmaker?
Michael Metzmaker 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.
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.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-08-06.