Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Colette Vassilian, D.O.

Pediatrics Physician in Alamo, CA · enumerated 2014.

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

National Provider Identifier

1104222660

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Registry record

Entity type Individual (Type 1)

Name Colette Vassilian

Credential D.O.

Sex Female

Practice address 1505 Saint Alphonsus Way, Alamo, CA, 94507

Phone (925) 838-4633

Enumeration date Nov 11, 2014

Last updated in NPPES Dec 19, 2024

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 20A14283 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Colette Vassilian?

The National Provider Identifier (NPI) for Colette Vassilian is 1104222660, a Type 1 (individual) record in the CMS NPPES registry.

Where does Colette Vassilian practice?

The practice location on file with NPPES is in Alamo, 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 2024-12-19.