Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David Guion, PH.D,

Q: What is the NPI number for David Guion?

The National Provider Identifier (NPI) for David Guion is 1659741171, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Psychologist in Ashland, VA · enumerated 2015.

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

National Provider Identifier

1659741171

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Registry record

Entity type Individual (Type 1)

Name David Guion

Credential PH.D,

Sex Male

Practice address 9671 Sliding Hill Rd Ste 204, Ashland, VA, 23005

Phone (804) 221-2042

Fax (804) 258-4351

Enumeration date Sep 26, 2015

Last updated in NPPES Jun 9, 2026

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810005208 (VA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
601041558	Medicaid	VA	-

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 David Guion practice?

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

What is the NPI number for David Guion?

The National Provider Identifier (NPI) for David Guion is 1659741171, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-09.