Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Leonard Dalian Rideau III

Mental Health Counselor in San Jose, CA · enumerated 2008 · practices at Momentum for Health.

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

National Provider Identifier

1255588182

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Registry record

Entity type Individual (Type 1)

Name Mr. Leonard Dalian Rideau III

Sex Male

Practice address 96 S 14th St, San Jose, CA, 95112

Phone (408) 998-3293

Enumeration date Aug 21, 2008

Last updated in NPPES Aug 22, 2023

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers Secondary

101YM0800X Mental Health 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Leonard Rideau?

Leonard Rideau is registered in NPPES with the primary taxonomy of Mental Health Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-22.