Geoffrey A. Geiger, MD
Radiation Oncology Physician · Covina, CA
Geoffrey A. Geiger, MD is a radiation oncology physician with a practice address in Covina, California, and NPI 1285836619, issued on Jun 5, 2007. Check the license (California G193306, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Geoffrey A. Geiger
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- G193306 CA
ME137894 FL
MD439170 PA
Self-reported in NPPES; status is on the state search - Practice location
- 554 E San Bernardino RD Ste 105, Covina, CA 91723
- Phone
- (626) 331-6866
- Enumerated
- Jun 5, 2007
- Record last updated
- Apr 29, 2024
- Fax
- (626) 331-6773
- Medicare enrollment
- Enrolled (PECOS I20240229004424); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Verify Geoffrey A. Geiger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G193306Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average radiation oncology physician in 2024
35 Medicare Part D claims, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Doxepin Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $811.20
6 payments; by number, the most common kind was food and beverage; the largest payer was Elekta, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Oncology Institute CA, A Professional CorporationDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Geoffrey A. Geiger among 735 radiation oncology physician records in California
Geoffrey A. Geiger, MD is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 43% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2007 · median 2005 among the 545 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in Covina → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Uri Zisblatt, M.D.Covina, CA 917231114921616
- David Hsu, MDMonterey Park, CA 917541619983343
- Dong Kim, M.D., PH.D.Ontario, CA 917611386816262
- Peter Austin, M.D.Diamond Bar, CA 917651487085221
- Sri Gorty, M.D.Pomona, CA 917671952310054
- Yallapragada Rao, M.D.Pomona, CA 917671871503490
- Cecil Benitez, M.D., PH.D.Upland, CA 917861578182739
- Sean Szeja, M.D.Upland, CA 917861023351822
Common questions
What is Geoffrey A. Geiger, MD's NPI number?
Geoffrey A. Geiger, MD's National Provider Identifier (NPI) is 1285836619, issued on Jun 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Geoffrey A. Geiger, MD located?
The NPPES record lists a practice address at 554 E San Bernardino RD Ste 105, Covina, CA, 91723. Phone: (626) 331-6866. Providers update this record themselves, so call before visiting.
How can I verify Geoffrey A. Geiger, MD's license?
NPPES lists California license number G193306, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Geoffrey A. Geiger, MD prescribe under Medicare Part D?
In 2024, Geoffrey A. Geiger, MD had 35 Medicare Part D claims; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.