Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Aaron Caldwell Sayers, PH.D.

Counseling Psychologist in Knoxville, TN · enumerated 2009.

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

National Provider Identifier

1043441470

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Registry record

Entity type Individual (Type 1)

Name Aaron Caldwell Sayers

Credential PH.D.

Sex Male

Practice address 2018 Western Ave, Knoxville, TN, 37921

Phone (865) 544-0406

Fax (865) 544-0480

Enumeration date Aug 3, 2009

Last updated in NPPES Oct 5, 2012

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License P3110 (TN) Primary

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

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 Aaron Sayers?

Aaron Sayers is registered in NPPES with the primary taxonomy of Counseling Psychologist. 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 2012-10-05.