Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Louis Guillot, DMD

Dentist in Hattiesburg, MS · enumerated 2006.

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

National Provider Identifier

1578541538

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Registry record

Entity type Individual (Type 1)

Name Dr. John Louis Guillot

Credential DMD

Sex Male

Practice address 49 Cross Creek Parkway, Hattiesburg, MS, 39402

Phone (601) 264-5800

Fax (601) 450-0064

Enumeration date Jan 9, 2006

Last updated in NPPES Sep 11, 2009

Taxonomy & licenses

122300000X Dentist Dental Providers · License 2872-95 (MS) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

How do I verify John Guillot's NPI record?

Cross-check NPI 1578541538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1578541538 active?

Yes, as of the latest NPPES snapshot, NPI 1578541538 is active (record last updated 2009-09-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-11.