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IWAN SING-DJWAN ONG MD
NPI 1265416739
Internal Medicine in Riverside, CA

Active since November 30, 2005PECOS EnrolledAccepts Medicare Assignment
10800 MAGNOLIA AVE, RIVERSIDE, CA 92505(866) 984-7483(626) 405-4600 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Iwan Sing-djwan Ong Md NPPES

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

IWAN SING-DJWAN ONG MD (NPI 1265416739) is an individual internal medicine provider in Riverside, California, licensed in California (G69360) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1989).

NPPES Registry Identity

NPI1265416739
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameIWAN SING-DJWAN ONGCredential: MD
Location Address10800 MAGNOLIA AVERiverside, CA 92505-3043
Mailing Address10800 Magnolia AveRiverside, CA 92505-3043 · (800) 984-7183 · Fax (951) 352-5147
Phone(866) 984-7483
Fax(626) 405-4600
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 1989
Enumeration DateNovember 30, 2005
Last NPPES UpdateDecember 1, 2021
✔ NPI 1265416739 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 · G69360
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.
10800 MAGNOLIA AVE, Riverside, CA 92505
Open in Google Maps ↗

Other Identifiers 1

OtherZZZ92058ZGroup Site Location

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Iwan Sing-djwan Ong Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6002984689
PECOS Enrollment IDI20090129000543
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92505 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

KAISER PERMANENTE
General Acute Care Hospital
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (951) 353-4988
PATRICK T MC GILL PA
Physician Assistant
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
ROBERT L. RUDEK MD
Surgery
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
RICHARD M. BRADBURNE MD
Internal Medicine (Critical Care Medicine)
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
SUNG JIN JOHN MD
Family Medicine
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
SHELLY C. THIO MD
Internal Medicine
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
GREGORY MARRUJO MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000
REBECCA J SEAWELL NP
Nurse Practitioner
10800 MAGNOLIA AVE
RIVERSIDE, CA 92505
Riverside County (909) 353-2000

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 Iwan Ong's NPI number?

The NPI number for Iwan Ong is 1265416739. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Where is Iwan Ong located?

Iwan Ong practices at 10800 Magnolia Ave, Riverside, CA 92505. The listed phone number is (866) 984-7483.

What is Iwan Ong's specialty?

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

Is Iwan Ong enrolled in Medicare?

Yes. Iwan Ong is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Iwan Ong was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.