Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Geoffrey Robert Adey, MD

Neurological Surgery Physician in Walnut Creek, CA · enumerated 2006.

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

National Provider Identifier

1447362520

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Registry record

Entity type Individual (Type 1)

Name Geoffrey Robert Adey

Credential MD

Sex Male

Practice address 1455 Montego Street, Suite 200, Walnut Creek, CA, 94598

Phone (925) 937-0404

Fax (925) 937-1340

Enumeration date Aug 31, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License G82135 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
G82135	Other	CA	BLUE CROSS OF CA
P00052861	Other	-	RAILROAD MEDICARE
00G821350	Medicaid	CA	-

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

How do I verify Geoffrey Adey's NPI record?

Cross-check NPI 1447362520 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1447362520 active?

Yes, as of the latest NPPES snapshot, NPI 1447362520 is active (record last updated 2007-07-08).

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