Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert A Aitchison, PH.D.

Psychologist in Yountville, CA · enumerated 2006.

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

National Provider Identifier

1700850047

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Robert A Aitchison

Credential PH.D.

Sex Male

Practice address 220 California Dr, Yountville, CA, 94599

Phone (707) 944-4716

Fax (707) 948-2530

Enumeration date Feb 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY 4819 (CA) 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

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.

What specialty is Robert Aitchison?

Robert Aitchison 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.

Other providers at this practice address

Browse all →

William Arnett General Practice Dentistry · Yountville, CA NPI 1265405112 John Budinger Psychiatry Physician · Yountville, CA NPI 1003880386 Cynthia Kapjian Family Medicine Physician · Yountville, CA NPI 1851365068 Edgar Calvelo Geriatric Medicine (Internal Medicine) Physician · Yountville, CA NPI 1912971995 Monica Banchero-Hasson Internal Medicine Physician · Yountville, CA NPI 1649244534 Clyde Cooper Anatomic Pathology & Clinical Pathology Physician · Yountville, CA NPI 1295700367 Lisa Allen Psychologist · Yountville, CA NPI 1467428193 Sarah Miller Psychologist · Yountville, CA NPI 1366418030

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