Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John David Simmons, D.D.S.

Q: What is the NPI number for John Simmons?

The National Provider Identifier (NPI) for John Simmons is 1578620951, a Type 1 (individual) record in the CMS NPPES registry.

General Practice Dentistry in Dexter, MO · enumerated 2007.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1578620951

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Registry record

Entity type Individual (Type 1)

Name Dr. John David Simmons

Credential D.D.S.

Sex Male

Practice address 1 W Grant St, Dexter, MO, 63841

Phone (573) 624-8236

Fax (573) 624-6162

Enumeration date Jan 3, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 12937 (MO) Primary

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Where does John Simmons practice?

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

What is the NPI number for John Simmons?

The National Provider Identifier (NPI) for John Simmons is 1578620951, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.