Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Steven M Gualdoni, PAC

Physician Assistant in Marquette, MI · enumerated 2005.

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

National Provider Identifier

1003800640

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Registry record

Entity type Individual (Type 1)

Name Mr. Steven M Gualdoni

Credential PAC

Sex Male

Practice address 1414 W Fair Ave, Ste 332, Marquette, MI, 49855

Phone (906) 225-3922

Fax (906) 225-4527

Enumeration date Sep 9, 2005

Last updated in NPPES Nov 1, 2007

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5601001259 (MI) Primary

Other identifiers

Identifier	Type	State	Issuer
P00231915	Other	MI	RAILROAD MEDICARE

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

How do I verify Steven Gualdoni's NPI record?

Cross-check NPI 1003800640 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003800640 active?

Yes, as of the latest NPPES snapshot, NPI 1003800640 is active (record last updated 2007-11-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-01.