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PECK YEOW ONG MD
NPI 1659478865
Pediatrics - Pediatric Allergy/Immunology in Los Angeles, CA

Active since September 20, 2006PECOS Enrolled
4650 SUNSET BLVD, LOS ANGELES, CA 90027(323) 669-2501(323) 669-4627 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Peck Yeow Ong Md NPPES

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

PECK YEOW ONG MD (NPI 1659478865) is an individual pediatric allergy/immunology provider in Los Angeles, California, licensed in California (A64334) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1659478865
Entity TypeIndividualMale
Primary Taxonomy2080P0201X
Provider Legal NamePECK YEOW ONGCredential: MD
Location Address4650 SUNSET BLVDLos Angeles, CA 90027-6062
Mailing Address6430 Sunset Blvd, Suite 600Los Angeles, CA 90028-7900 · (323) 669-2337 · Fax (323) 644-8488
Phone(323) 669-2501
Fax(323) 669-4627
Sole ProprietorNo
Enumeration DateSeptember 20, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1659478865 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Allergy/ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0201X
License✔ Licensed in CA · A64334
Definition
A pediatrician who specializes in the diagnosis and treatment of allergies, allergic reactions, and immunologic diseases in children.
4650 SUNSET BLVD, Los Angeles, CA 90027
Open in Google Maps ↗

Other Identifiers 3

Medicare ID-Type UnspecifiedWA64334BCA
Medicaid00A643340CA
Medicare UPINH30695

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Peck Yeow Ong Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Peck Ong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Hospital Los Angeles Medical Group, Inc.
Same address
Multi-Specialty
4650 SUNSET BLVD
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
  • 1,281 clinicians in this Medicare group
NPI 1265530653 (323) 361-2337

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

ROWENA CAYABYAB MD
Pediatrics (Neonatal-Perinatal Medicine)
4650 SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 226-3406
CAMERON LEIGH NEECE M.A.
Counselor (Mental Health)
4650 SUNSET BLVD, MAILSTOP 53
LOS ANGELES, CA 90027
Los Angeles County (510) 453-4274
MR. ROY VILLENA TATLONGHARI RN-CANP
Nurse Practitioner (Adult Health)
4650 SUNSET BLVD, MS 125
LOS ANGELES, CA 90027
Los Angeles County (323) 361-2533
MRS. WENDY SETO LEUNG CRNP
Nurse Practitioner (Pediatrics)
4650 SUNSET BLVD, MAIL STOP #54
LOS ANGELES, CA 90027
Los Angeles County (323) 361-4141
JILL MARIE MADISON-BUTTE RD REGISTERED DIETIT
Dietitian, Registered
4650 SUNSET BLVD, MAIL STOP 8
LOS ANGELES, CA 90027
Los Angeles County (323) 361-4173
JENNIFER SCHIES SAUVE PH.D.
Psychologist (Clinical Child & Adolescent)
4650 SUNSET BLVD, MS 53 CHILDRENS HOSPITAL LOS ANGELES
LOS ANGELES, CA 90027
Los Angeles County (323) 361-3849
REBECCA LYN WYNSMA
Psychologist
4650 SUNSET BLVD, MS #53
LOS ANGELES, CA 90027
Los Angeles County (323) 361-3849
SUSAN WU MD
Pediatrics
4650 SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 669-2534

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 Peck Ong's NPI number?

The NPI number for Peck Ong is 1659478865. It was assigned to this individual provider in the NPPES registry on September 20, 2006.

Where is Peck Ong located?

Peck Ong practices at 4650 Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 669-2501.

What is Peck Ong's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Allergy/Immunology, with taxonomy code 2080P0201X.

Is Peck Ong enrolled in Medicare?

Yes. Peck Ong is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Peck Ong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Peck Ong reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Peck Ong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Peck Ong was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.