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Mark Demesa

Counselor in Concord, CA · enumerated 2025 · practices at Clayton Valley Charter High School.

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

National Provider Identifier

1467328575

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Registry record

Entity type Individual (Type 1)
Name Mark Demesa
Sex Male
Practice address 1101 Alberta Way, Concord, CA, 94521
Phone (925) 682-7474
Enumeration date Oct 15, 2025
Last updated in NPPES Oct 15, 2025

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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 Mark Demesa?
Mark Demesa is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-15.