GEOFFREY ROBERT ADEY MD
NPI 1447362520
Neurological Surgery in Walnut Creek, CA

Active since August 31, 2006PECOS Enrolled
1455 MONTEGO STREET, SUITE 200, WALNUT CREEK, CA 94598(925) 937-0404(925) 937-1340 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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

NPI1447362520
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameGEOFFREY ROBERT ADEYCredential: MD
Location Address1455 MONTEGO STREET, SUITE 200Walnut Creek, CA 94598
Mailing Address1101 Se Tech Center Drive, Suite #155Vancouver, WA 98683-5521 · (360) 514-9040 · Fax (360) 514-9041
Fax(925) 937-1340
Sole ProprietorNo
Enumeration DateAugust 31, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1447362520 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License✔ Licensed in CA · G82135
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
1455 MONTEGO STREET, Walnut Creek, CA 94598

Other Identifiers 5

OtherP00052861Railroad Medicare
Medicaid00G821350CA
Medicare UPING26483
Medicare ID-Type Unspecified00G821350CA
OtherG82135CA · Blue Cross Of Ca

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).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

Hospitalist
1601 YGNACIO VALLEY RD
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.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.