Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher James Walerysiak, PA-C

Physician Assistant in Agana Heights, GU · enumerated 2021.

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

National Provider Identifier

1891375937

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Registry record

Entity type Individual (Type 1)

Name Christopher James Walerysiak

Credential PA-C

Sex Male

Practice address U.S. Naval Hospital Guam, Bldg 50, Farenholt Avenue, Agana Heights, GU, 96910

Phone (671) 344-9340

Enumeration date Apr 13, 2021

Last updated in NPPES Jan 29, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 0010-13374 (NC) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1891375937 active?

Yes, as of the latest NPPES snapshot, NPI 1891375937 is active (record last updated 2025-01-29).

How do I verify Christopher Walerysiak's NPI record?

Cross-check NPI 1891375937 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-29.