GEOFFREY A GEIGER MD
NPI 1285836619
Radiology - Radiation Oncology in Covina, CA
About Geoffrey A Geiger Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEOFFREY A GEIGER MD (NPI 1285836619) is an individual radiation oncology provider in Covina, California, licensed in California (G193306) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS and is a graduate of Pennsylvania State University College Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Geoffrey A Geiger Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Geoffrey Geiger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Downey, CA 90241
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: The Oncology Institute Ca, A Professional Corporation
- 110 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 91723 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
COVINA, CA 91723
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 Geiger's NPI number?
The NPI number for Geoffrey Geiger is 1285836619. It was assigned to this individual provider in the NPPES registry on June 5, 2007.
Where is Geoffrey Geiger located?
Geoffrey Geiger practices at 554 E San Bernardino Rd Ste 105, Covina, CA 91723. The listed phone number is (626) 331-6866.
What is Geoffrey Geiger's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Geoffrey Geiger enrolled in Medicare?
Yes. Geoffrey Geiger is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Geoffrey Geiger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Geoffrey Geiger reassigns Medicare benefits to Starling Oncology Ca, A Professional Corporation (Downey, 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 Geiger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Geoffrey Geiger accept?
Health plans from UnitedHealthcare list Geoffrey Geiger as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Geoffrey Geiger was last updated on April 29, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Geoffrey A Geiger, MD · NPI 1285836619
Radiation Oncology physician in Covina, California. Individual provider, active in the CMS NPPES registry since June 5, 2007.
## Identity
- **NPI:** 1285836619 (Entity type: Individual)
- **Enumerated:** June 5, 2007
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** G193306 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 554 E SAN BERNARDINO RD STE 105, Covina, CA 91723-1748
- **Phone:** (626) 331-6866 · **Fax:** (626) 331-6773
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Starling Oncology Ca, A Professional Corporation (NPI 1275651515, Downey, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Pennsylvania State University College Of Medicine, class of 2007
## Record status
- **NPPES last updated:** April 29, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1285836619) · Data from the CMS NPPES public registry.