Gregory Alan Gilmore, D.O.
Hematology & Oncology Physician · Corona, CA
Gregory Alan Gilmore, D.O. is a hematology & oncology physician with a practice address in Corona, California, and NPI 1205271640, issued on Apr 29, 2013. Check the license (California 20A13656, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Alan Gilmore
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 20A13656 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 W 6TH St, Corona, CA 92882
- Phone
- (951) 898-2828
- Enumerated
- Apr 29, 2013
- Record last updated
- Jun 8, 2022
- Fax
- (951) 898-2811
- Medicare enrollment
- Enrolled (PECOS I20190827001433); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 320 W 6TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Del Carmen Bustos, LCSWClinical Social Worker1275217796
- Parisa Malekzadeh, M.D.Surgical Oncology Physician1992055149
- Rahul Dev Polineni, M.DHematology & Oncology Physician1235375155
Verify Gregory Alan Gilmore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13656Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,297 Medicare Part D claims for 213 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 113 claims were for opioids.
Most prescribed
- Ondansetron Hcl115 claims
- Dexamethasone102 claims
- Prochlorperazine Maleate76 claims
- Hydrocodone-Acetaminophen50 claims
- Anastrozole38 claims
- Xtandi36 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 99.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $57.37
2 payments; by number, the most common kind was food and beverage; the largest payer was PharmaEssentia USA Corporation. The 8,560 providers of this specialty with any payment received $7,481.41 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
- City OF Hope Medical FoundationUpland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Alan Gilmore among 1,583 hematology & oncology physician records in California
Gregory Alan Gilmore, D.O. is one of 1,583 hematology & 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 2013, is newer than 79% of them.
- NPI issued2013 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2013 · median 2003 among the 1,124 with a school on file
- Record last updated2022 · 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 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Corona → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Rahul Dev Polineni, M.DCorona, CA 928821235375155
- Chih-Hong Young, M.D.Corona, CA 928821417919572
- Rehana Baqai, M.D.Corona, CA 928791164478855
- Hussein Merza, MDCorona, CA 928791235409673
- Mohammadbagher Ziari, MDCorona, CA 928791962601047
- Matthew Keating, M.D.Yorba Linda, CA 928861275948481
- Zhaohui Arter, MDOrange, CA 928681184116451
- April Choi, MDOrange, CA 928681154825800
Common questions
What is Gregory Alan Gilmore, D.O.'s NPI number?
Gregory Alan Gilmore, D.O.'s National Provider Identifier (NPI) is 1205271640, issued on Apr 29, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Alan Gilmore, D.O. located?
The NPPES record lists a practice address at 320 W 6TH St, Corona, CA, 92882. Phone: (951) 898-2828. Providers update this record themselves, so call before visiting.
How can I verify Gregory Alan Gilmore, D.O.'s license?
NPPES lists California license number 20A13656, 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 Gregory Alan Gilmore, D.O. prescribe under Medicare Part D?
In 2024, Gregory Alan Gilmore, D.O. had 1,297 Medicare Part D claims for 213 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Gregory Alan Gilmore, D.O.'s MIPS final score?
The 2023 MIPS final score is 99.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.