SUJAY DAYAL
NPI 1740920966
Internal Medicine in Ontario, CA

Active since March 29, 2022
437 N EUCLID AVE, ONTARIO, CA 91762(909) 988-2555 Get Directions Write a Review

NPPES record last updated: June 1, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Sujay Dayal NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SUJAY DAYAL (NPI 1740920966) is an individual internal medicine provider in Ontario, California, licensed in California (21643) and active in the NPI registry since March 2022.

NPPES Registry Identity

NPI1740920966
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameSUJAY DAYAL
Location Address437 N EUCLID AVEOntario, CA 91762-3427
Mailing Address2334 Brown Deer CtChino Hills, CA 91709-4351
Sole ProprietorYes
Enumeration DateMarch 29, 2022
Last NPPES UpdateJune 1, 2026
NPPES CertifiedJune 1, 2026
NPI 1740920966 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in CA · 21643
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
437 N EUCLID AVE, Ontario, CA 91762

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Practitioner (Family)
437 N EUCLID AVE
ONTARIO, CA 91762
Pharmacy (Community/Retail Pharmacy)
437 N EUCLID AVE, SUITE B
ONTARIO, CA 91762
Physician Assistant
437 N EUCLID AVE
ONTARIO, CA 91762
Family Medicine
437 N EUCLID AVE
ONTARIO, CA 91762
Nurse Practitioner (Family)
437 N EUCLID AVE
ONTARIO, CA 91762
Social Worker (Clinical)
437 N EUCLID AVE
ONTARIO, CA 91762
Family Medicine
437 N EUCLID AVE
ONTARIO, CA 91762
Family Medicine
437 N EUCLID AVE
ONTARIO, CA 91762

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sujay Dayal's NPI number?

The NPI number for Sujay Dayal is 1740920966. It was assigned to this individual provider in the NPPES registry on March 29, 2022.

Where is Sujay Dayal located?

Sujay Dayal practices at 437 N Euclid Ave, Ontario, CA 91762. The listed phone number is (909) 988-2555.

What is Sujay Dayal's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Sujay Dayal was last updated on June 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.