Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Zwiacher, M.D.

Surgery Physician in Palmer, AK · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1457380438

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Registry record

Entity type Individual (Type 1)

Name John Zwiacher

Credential M.D.

Sex Male

Practice address 2490 S Woodworth Loop, Suite 300, Palmer, AK, 99645

Phone (907) 357-1917

Enumeration date Jul 1, 2006

Last updated in NPPES Jun 17, 2008

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 3719 (AK) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Zwiacher?

The National Provider Identifier (NPI) for John Zwiacher is 1457380438, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Zwiacher practice?

The practice location on file with NPPES is in Palmer, AK. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-17.