HILARY ONG
NPI 1053768093
Pediatrics in Los Angeles, CA
About Hilary Ong NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HILARY ONG (NPI 1053768093) is an individual pediatrics provider in Los Angeles, California, licensed in California (A140369) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Hilary Ong is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Hilary Ong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90027 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
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 Hilary Ong's NPI number?
The NPI number for Hilary Ong is 1053768093. It was assigned to this individual provider in the NPPES registry on May 19, 2016.
Where is Hilary Ong located?
Hilary Ong practices at 4650 W Sunset Blvd Mailstop #68, Los Angeles, CA 90027. The listed phone number is (323) 361-2122.
What is Hilary Ong's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Hilary Ong enrolled in Medicare?
Yes. Hilary Ong is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Hilary Ong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hilary Ong reassigns Medicare benefits to 2 organizations: University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each 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 Hilary 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 Hilary Ong was last updated on May 19, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Hilary Ong · NPI 1053768093
Pediatrics physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since May 19, 2016.
## Identity
- **NPI:** 1053768093 (Entity type: Individual)
- **Enumerated:** May 19, 2016
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A140369 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4650 W SUNSET BLVD, MAILSTOP #68, Los Angeles, CA 90027-6062
- **Phone:** (323) 361-2122
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 19, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1053768093) · Data from the CMS NPPES public registry.