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

Richard Allan Diwald, RAS

Addiction (Substance Use Disorder) Counselor in Lakeport, CA · enumerated 2006.

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

National Provider Identifier

1861558678

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Registry record

Entity type Individual (Type 1)

Name Richard Allan Diwald

Credential RAS

Sex Male

Practice address Lakeport, CA, 95453

Phone (707) 263-8162

Fax (707) 263-9336

Enumeration date Dec 28, 2006

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 · License D0412282000 (CA) 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

What is the NPI number for Richard Diwald?

The National Provider Identifier (NPI) for Richard Diwald is 1861558678, a Type 1 (individual) record in the CMS NPPES registry.

Where does Richard Diwald practice?

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

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