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

Dr. Constantine J Karsant, DDS

General Practice Dentistry in San Francisco, CA · enumerated 2005.

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

National Provider Identifier

1356346753

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Registry record

Entity type Individual (Type 1)

Name Dr. Constantine J Karsant

Credential DDS

Sex Male

Practice address San Francisco, CA, 94103

Phone (415) 929-6500

Enumeration date Jun 14, 2005

Last updated in NPPES Jul 26, 2016

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 32866 (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

Where does Constantine Karsant practice?

The practice location on file with NPPES is in San Francisco, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Constantine Karsant?

The National Provider Identifier (NPI) for Constantine Karsant is 1356346753, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-07-26.