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

Dennis Mark Matlock, RS1503

Addiction (Substance Use Disorder) Counselor in Indio, CA · enumerated 2007 · practices at Mental Health Substance Abuse Program.

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

National Provider Identifier

1457490088

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Registry record

Entity type Individual (Type 1)
Name Dennis Mark Matlock
Credential RS1503
Sex Male
Practice address Indio, CA, 92201
Phone (760) 347-0754
Enumeration date Feb 6, 2007
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) 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

How do I verify Dennis Matlock's NPI record?
Cross-check NPI 1457490088 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1457490088 active?
Yes, as of the latest NPPES snapshot, NPI 1457490088 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.