NPPES file of Aug 9, 2026

Sujay Dayal

Internal Medicine Physician · Ontario, CA

Sujay Dayal is an internal medicine physician with a practice address in Ontario, California, and NPI 1740920966, issued on Mar 29, 2022. Check the license (California 21643, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1740920966
Name
Sujay Dayal
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
21643 CA
Self-reported in NPPES; status is on the state search
Practice location
437 N Euclid Ave, Ontario, CA 91762
Phone
(909) 988-2555
Enumerated
Mar 29, 2022
Record last updated
Jun 1, 2026
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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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 437 N Euclid Ave

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

  1. Katherine Beltre EspinosaPhysician Assistant1811765944
  2. Debra Blanco, PA-CPhysician Assistant1740372366
  3. Vache Chakmakian, M.D.Family Medicine Physician1316974652
  4. Hawanatu Fofanah, NPFamily Nurse Practitioner1831561448
  5. Gryan GarciaPsychiatric/Mental Health Nurse Practitioner1578103800
  6. Khan Lau, O.D.Corneal and Contact Management Optometrist1730229345

Verify Sujay Dayal in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 21643    Check 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.

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Sujay Dayal among 17,696 internal medicine physician records in California

Sujay Dayal is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2022, is newer than 95% of them.

  • NPI issued2022 · 95% of these records are older, 2% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2026 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Internal Medicine Physician providers in California

There are 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,696 in California → Every provider in Ontario → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Mohammed Al-Khayyat, M.D.Montclair, CA 917631588195424
  2. Liwanag Asuncion, M.D.Ontario, CA 917611437122082
  3. Khanh Duong, MDMontclair, CA 917631225528466
  4. David Hirota, M.D.Ontario, CA 917611699735191
  5. Dion Kencana, MDMontclair, CA 917631528709805
  6. Sadia Khan, MDMontclair, CA 917631225271125
  7. George Moran, MDMontclair, CA 917631639673635
  8. Kiandokht Partovi, M.D.Montclair, CA 917631689763427

Common questions

What is Sujay Dayal's NPI number?

Sujay Dayal's National Provider Identifier (NPI) is 1740920966, issued on Mar 29, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Sujay Dayal located?

The NPPES record lists a practice address at 437 N Euclid Ave, Ontario, CA, 91762. Phone: (909) 988-2555. Providers update this record themselves, so call before visiting.

How can I verify Sujay Dayal's license?

NPPES lists California license number 21643, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.