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

Mr. Darrell M Guest, LISW-S, LICDC

Clinical Social Worker in Dayton, OH · enumerated 2005.

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

National Provider Identifier

1609853753

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Registry record

Entity type Individual (Type 1)

Name Mr. Darrell M Guest

Credential LISW-S, LICDC

Sex Male

Practice address Dayton, OH, 45432

Phone (937) 223-1781

Fax (937) 853-0096

Enumeration date Dec 29, 2005

Last updated in NPPES Jan 28, 2025

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License I.1302017 (OH) Primary

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 001182 (OH) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License W909 (OH) Secondary

Other identifiers

Identifier	Type	State	Issuer
2272231	Medicaid	OH	-

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 Darrell Guest practice?

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

What is the NPI number for Darrell Guest?

The National Provider Identifier (NPI) for Darrell Guest is 1609853753, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-28.