Geoffrey Adey, MD
NPI 1447362520 · Neurological Surgery Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geoffrey Adey, MD is a Neurological Surgery Physician provider in Walnut Creek, CA (NPI 1447362520).
Provider details
- NPI number
- 1447362520
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G82135 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$71 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Geoffrey Adey's NPI number?
- Geoffrey Adey's National Provider Identifier (NPI) is 1447362520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geoffrey Adey's specialty?
- Geoffrey Adey is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Geoffrey Adey located?
- Geoffrey Adey's practice location on file with NPPES is 1455 Montego Street, Walnut Creek, CA 94598.
- What is Geoffrey Adey's phone number?
- The practice phone number listed in the NPPES registry for Geoffrey Adey is (925) 937-0404.
- Does Geoffrey Adey accept Medicare?
- Geoffrey Adey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geoffrey Adey's NPI active?
- Yes — Geoffrey Adey's NPI (1447362520) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.