Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Richard Alan Amstadter, DDS

Dentist in Modesto, CA · enumerated 2007.

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

National Provider Identifier

1598887168

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Registry record

Entity type Individual (Type 1)

Name Dr. Richard Alan Amstadter

Credential DDS

Sex Male

Practice address 817 Coffee Rd, Suite A-1, Modesto, CA, 95355

Phone (209) 523-7722

Fax (209) 523-7810

Enumeration date Apr 4, 2007

Last updated in NPPES May 22, 2008

Taxonomy & licenses

122300000X Dentist Dental Providers · License 36641 (CA) 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

What is the NPI number for Richard Amstadter?

The National Provider Identifier (NPI) for Richard Amstadter is 1598887168, a Type 1 (individual) record in the CMS NPPES registry.

Where does Richard Amstadter practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-22.