GEOFFREY ROBERT ADEY MD
NPI 1447362520
Neurological Surgery in Walnut Creek, CA
About Geoffrey Robert Adey Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEOFFREY ROBERT ADEY MD (NPI 1447362520) is an individual neurological surgery provider in Walnut Creek, California, licensed in California (G82135) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Geoffrey Robert Adey Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Geoffrey Adey reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Geoffrey Adey's NPI number?
The NPI number for Geoffrey Adey is 1447362520. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is Geoffrey Adey located?
Geoffrey Adey practices at 1455 Montego Street Suite 200, Walnut Creek, CA 94598. The listed phone number is (925) 937-0404.
What is Geoffrey Adey's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Geoffrey Adey enrolled in Medicare?
Yes. Geoffrey Adey is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Geoffrey Adey's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Geoffrey Adey reassigns Medicare benefits to John Muir Trauma Physicians Billing Service (Walnut Creek, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Geoffrey Adey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Geoffrey Adey was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.