Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Colin S. Ilas D.D.S.

Q: What type of organization is Colin S. Ilas D.D.S.?

Colin S. Ilas D.D.S. is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

General Practice Dentistry in Concord, CA · enumerated 2020 · authorized official Genevieve Ong, Office Manager.

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

National Provider Identifier

1427698877

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Registry record

Entity type Organization (Type 2)

Legal business name Colin S. Ilas D.D.S.

Parent organization Colin S. Ilas D.D.S.

Practice address 2030 Diamond Blvd Ste 25, Concord, CA, 94520

Phone (925) 687-8000

Enumeration date Jan 14, 2020

Last updated in NPPES Jan 14, 2020

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers Primary

Authorized official

Name Genevieve Ong

Title Office Manager

Phone (925) 687-8000

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 type of organization is Colin S. Ilas D.D.S.?

Colin S. Ilas D.D.S. is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-01-14.