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

Dr. Clifford Owen Marks, D.D.S.

General Practice Dentistry in Campbell, CA · enumerated 2005.

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

National Provider Identifier

1396741484

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Registry record

Entity type Individual (Type 1)
Name Dr. Clifford Owen Marks
Credential D.D.S.
Sex Male
Practice address Campbell, CA, 95008
Phone (408) 378-3489
Fax (408) 378-0134
Enumeration date Jun 22, 2005
Last updated in NPPES Jun 21, 2008

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 35143 (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
B35143 Medicaid CA -

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

How do I verify Clifford Marks's NPI record?
Cross-check NPI 1396741484 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1396741484 active?
Yes, as of the latest NPPES snapshot, NPI 1396741484 is active (record last updated 2008-06-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-21.