Alexander James Geyer, M.D.
Family Medicine Physician · Corona, CA
Alexander James Geyer, M.D. is a family medicine physician with a practice address in Corona, California, and NPI 1053775684, issued on Apr 10, 2016. Check the license (California A154572, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander James Geyer
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A154572 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21634 Retreat Pkwy, Corona, CA 92883
- Phone
- (951) 493-6921
- Enumerated
- Apr 10, 2016
- Record last updated
- Apr 14, 2025
- Fax
- (951) 826-8157
- Medicare enrollment
- Enrolled (PECOS I20191014000388); accepts Medicare assignment
- Medical or professional school
- University Of Arizona College Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 21634 Retreat Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alexander James Geyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A154572Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average family medicine physician in 2024
7,773 Medicare Part D claims for 678 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium712 claims
- Losartan Potassium551 claims
- Amlodipine Besylate430 claims
- Levothyroxine Sodium245 claims
- Omeprazole238 claims
- Alendronate Sodium217 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: $150.54
7 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Riverside Medical Clinic IncRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander James Geyer among 17,133 family medicine physician records in California
Alexander James Geyer, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2012 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
42 family medicine physician records list a practice address in Corona
They are 42 of the 3,731 NPPES records with a practice address in Corona, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Corona → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Khaled El Said, M.D.Corona, CA 928831043487762
- Jacquelyn Lacera, MDCorona, CA 928831063499200
- Mallory Leon, D.O.Corona, CA 928831285615864
- Misbah Patel Rasool, M.D.Corona, CA 928831043688633
- Sheterah Burnett-Wrenn, FNP-CCorona, CA 928821891182002
- Leala Lettice, D.O.Corona, CA 928821386023604
- Jordan Mercado, FNP-CCorona, CA 928821871308833
- Tanya Nanayakkara, M.D.Corona, CA 928821255644100
Common questions
What is Alexander James Geyer, M.D.'s NPI number?
Alexander James Geyer, M.D.'s National Provider Identifier (NPI) is 1053775684, issued on Apr 10, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Alexander James Geyer, M.D. located?
The NPPES record lists a practice address at 21634 Retreat Pkwy, Corona, CA, 92883. Phone: (951) 493-6921. Providers update this record themselves, so call before visiting.
How can I verify Alexander James Geyer, M.D.'s license?
NPPES lists California license number A154572, 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 Alexander James Geyer, M.D. prescribe under Medicare Part D?
In 2024, Alexander James Geyer, M.D. had 7,773 Medicare Part D claims for 678 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.