Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Grant William Clark

Physician Assistant in Waterloo, IA · enumerated 2025.

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

National Provider Identifier

1134007487

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Registry record

Entity type Individual (Type 1)

Name Grant William Clark

Sex Male

Practice address 1825 Logan Ave, Waterloo, IA, 50703

Phone (319) 235-3941

Enumeration date Aug 25, 2025

Last updated in NPPES Sep 23, 2026

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 141166 (IA) 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 1134007487 active?

Yes, as of the latest NPPES snapshot, NPI 1134007487 is active (record last updated 2026-09-23).

How do I verify Grant Clark's NPI record?

Cross-check NPI 1134007487 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 2026-09-23.