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

Dr. Timothy Dean Irish, DDS, MSD

Orthodontics and Dentofacial Orthopedics Dentistry in Sonoma, CA · enumerated 2011.

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

National Provider Identifier

1679854517

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Registry record

Entity type Individual (Type 1)

Name Dr. Timothy Dean Irish

Credential DDS, MSD

Sex Male

Practice address Sonoma, CA, 95476

Phone (707) 935-6878

Fax (707) 935-6811

Enumeration date Sep 6, 2011

Last updated in NPPES Sep 6, 2011

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

Taxonomy & licenses

1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License 38544 (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

Is NPI 1679854517 active?

Yes, as of the latest NPPES snapshot, NPI 1679854517 is active (record last updated 2011-09-06).

How do I verify Timothy Irish's NPI record?

Cross-check NPI 1679854517 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-06.