Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Philip John Vassilopoulos, D.D.S., D.M.D.

Periodontics in San Ramon, CA · enumerated 2007 · practices at Deepthy Thomas, DDS, Inc..

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

National Provider Identifier

1538382569

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Registry record

Entity type Individual (Type 1)

Name Dr. Philip John Vassilopoulos

Credential D.D.S., D.M.D.

Sex Male

Practice address 2202 Camino Ramon, San Ramon, CA, 94583

Phone (925) 830-9800

Fax (925) 830-9801

Enumeration date Apr 10, 2007

Last updated in NPPES Sep 24, 2021

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License DN16639 (FL) Secondary

1223P0300X Periodontics Dental Providers · License 63089 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
1265908404	Other	CA	GROUP NPI

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Philip Vassilopoulos?

Philip Vassilopoulos is registered in NPPES with the primary taxonomy of Periodontics. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Deepthy Thomas General Practice Dentistry · San Ramon, CA NPI 1396803482 Jennifer Masters Dentist · San Ramon, CA NPI 1649641424 Deepthy Thomas, DDS, Inc. Periodontics · San Ramon, CA NPI 1265908404

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-24.