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DR. ALEXANDER ONG SY MD, MBA, MSL
NPI 1144297748
Internal Medicine - Critical Care Medicine in Loma Linda, CA

Active since March 02, 2006
11201 BENTON ST, LOMA LINDA, CA 92357(909) 825-7084 Get Directions Write a Review

NPPES record last updated: March 6, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Alexander Ong Sy Md, Mba, Msl NPPES

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

DR. ALEXANDER ONG SY MD, MBA, MSL (NPI 1144297748) is an individual critical care medicine provider in Loma Linda, California, licensed in California (177284) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1144297748
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameDR. ALEXANDER ONG SYCredential: MD, MBA, MSL
Location Address11201 BENTON STLoma Linda, CA 92357-0001
Mailing Address1724 Camellia LnRedlands, CA 92374-1414 · (336) 793-7278
Phone(909) 825-7084
Sole ProprietorNo
Enumeration DateMarch 2, 2006
Last NPPES UpdateMarch 6, 2025
NPPES CertifiedMarch 6, 2025
✔ NPI 1144297748 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License✔ Licensed in CA · 177284
Definition
An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.
Also ListedInternal MedicineTaxonomy 207R00000X · License 177284 (CA)
Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License 177284 (CA)
Also ListedInternal Medicine · Sleep MedicineTaxonomy 207RS0012X · License 177284 (CA)
11201 BENTON ST, Loma Linda, CA 92357
Open in Google Maps ↗

Other Identifiers 1

Medicaid266223SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next.Insurance ›

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.

DR. ARTHUR CHUNG-LIUNG CHANG M.D.
Radiology (Diagnostic Radiology)
11201 BENTON ST, VA LOMA LINDA HEALTHCARE SYSTEM - DEPT OF RADIOLOGY
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
JUNGMI LEE LCSW
Social Worker (Clinical)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
PETRU PAPACOSTEA
Internal Medicine
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
PATTY J DALLMEIER RRT
Respiratory Therapist, Registered (Pulmonary Diagnostics)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
PATTY BEAVER LSW
Counselor (Mental Health)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 674-2794
DR. KRYSTAL GREGG PSYD
Psychologist (Clinical)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
HOLLY CORNEJO FNP-C
Nurse Practitioner (Family)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 825-7084
MELISSA SOLOMON-JACKSON
Registered Nurse (Emergency)
11201 BENTON ST
LOMA LINDA, CA 92357
San Bernardino County (909) 805-7084

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 Alexander Sy's NPI number?

The NPI number for Alexander Sy is 1144297748. It was assigned to this individual provider in the NPPES registry on March 2, 2006.

Where is Alexander Sy located?

Alexander Sy practices at 11201 Benton St, Loma Linda, CA 92357. The listed phone number is (909) 825-7084.

What is Alexander Sy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

What insurance does Alexander Sy accept?

Health plans from AmeriHealth Caritas Next list Alexander Sy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alexander Sy was last updated on March 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.