Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Aaron Eugene Bartholomew, PSYD

Psychologist in Napa, CA · enumerated 2009.

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

National Provider Identifier

1689807596

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Registry record

Entity type Individual (Type 1)

Name Mr. Aaron Eugene Bartholomew

Credential PSYD

Sex Male

Practice address 2100 Napa Vallejo Hwy, Napa, CA, 94558

Phone (707) 253-5654

Fax (707) 253-5097

Enumeration date Aug 26, 2009

Last updated in NPPES Jan 3, 2022

Taxonomy & licenses

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

103T00000X Psychologist Behavioral Health & Social Service Providers · License 27487 (CA) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD 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 Bartholomew?

Aaron Bartholomew is registered in NPPES with the primary taxonomy of 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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Amardeep Sahota Internal Medicine Physician · Napa, CA NPI 1831192103 Claire Fry Psychiatric Pharmacist · Napa, CA NPI 1538151980 Lane Melgarejo Internal Medicine Physician · Napa, CA NPI 1588657308 Andrew Sawicki Podiatrist · Napa, CA NPI 1306834163 Ernest Hanes Psychiatry Physician · Napa, CA NPI 1659361574 Richard Frishman Psychiatry Physician · Napa, CA NPI 1174507347 David Morse Podiatrist · Napa, CA NPI 1871579748 Katherine Warburton Forensic Psychiatry Physician · Napa, CA NPI 1295709277

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-03.