Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Derek Max Downing, DDS

Dentist in Winchester, CA · enumerated 2023.

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

National Provider Identifier

1881388924

Verified

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Registry record

Entity type Individual (Type 1)

Name Derek Max Downing

Credential DDS

Sex Male

Practice address Winchester, CA, 92596

Phone (951) 335-5169

Enumeration date Jun 2, 2023

Last updated in NPPES May 2, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 7765 (OK) Secondary

122300000X Dentist Dental Providers · License DDS111399 (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 Derek Downing?

The National Provider Identifier (NPI) for Derek Downing is 1881388924, a Type 1 (individual) record in the CMS NPPES registry.

Where does Derek Downing practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-02.