Registry data as of Aug 27, 2026

John Dimare, M.D.

Geriatric Medicine (Family Medicine) Physician · Glendora, CA

John Dimare, M.D. is a geriatric medicine (family medicine) physician with a practice address in Glendora, California, and NPI 1013246578, issued on Dec 12, 2009. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1013246578
Name
John Dimare
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Family Medicine) Physician 207QG0300X
Practice location
250 S Grand Ave, Glendora, CA 91741
Phone
(626) 857-3242
Enumerated
Dec 12, 2009
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 250 S Grand Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michael Ronald Alcantara, RNEmergency Registered Nurse1306538905
  2. Mari AlmondEmergency Registered Nurse1689220493
  3. Josue BlancoEmergency Registered Nurse1790331486
  4. Martin Bohorquez, M.D.Anesthesiology Physician1073569307
  5. Yong Chen, M.D.Anesthesiology Physician1528247608
  6. Michael Deyoung, MDEmergency Medicine Physician1801822606

Verify John Dimare in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

100% fewer Medicare Part D claims than the average geriatric medicine (family medicine) physician in 2024

23 Medicare Part D claims, against an average of 4,917 among the 1,261 providers of this specialty who prescribed in Part D.

  1. John Dimare23
  2. Specialty average4,917

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: $18.23

1 payment, mostly food and beverage; the largest payer was Gilead Sciences, Inc.. The 498 providers of this specialty with any payment received $2,104.14 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. John Dimare$18.23
  2. Specialty average$2,104.14

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Geriatric Medicine (Family Medicine) Physician providers in California

There are 250 geriatric medicine (family medicine) physician records in California.

Other geriatric medicine (family medicine) physician records in California

  1. Nagina Abdiani, DOOrange, CA1518543271
  2. Shivali Agarwal, M.D.Fresno, CA1518493626
  3. Kent Ahn, MDFontana, CA1083762017
  4. Theresa Allison, M.D.San Francisco, CA1760415004
  5. Nancy Alvarez, NPSimi Valley, CA1437885837
  6. Aarthi Anand, M.D.Palo Alto, CA1881776060
  7. Eddy Ang, MD, MPHSouth Gate, CA1508158197
  8. Hermenegildo Angeles, MD APCDaly City, CA1396712303
  9. Lianna Ansryan, RN-GERO, MSN, CNS,Los Angeles, CA1568047645
  10. Celestine Arambulo, DOSan Diego, CA1477624377

Common questions

What is John Dimare, M.D.'s NPI number?

John Dimare, M.D.'s National Provider Identifier (NPI) is 1013246578, issued on Dec 12, 2009. An NPI identifies a provider in billing; it is not a license.

Where is John Dimare, M.D. located?

The NPPES record lists a practice address at 250 S Grand Ave, Glendora, CA, 91741. Phone: (626) 857-3242. Providers update this record themselves, so call before visiting.

How can I verify John Dimare, M.D.'s license?

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 John Dimare, M.D. prescribe under Medicare Part D?

In 2024, John Dimare, M.D. had 23 Medicare Part D claims; the average among geriatric medicine (family medicine) physician prescribers was 4,917. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.