Hilary Ong
Pediatrics Physician · Los Angeles, CA
Hilary Ong is a pediatrics physician with a practice address in Los Angeles, California, and NPI 1053768093, issued on May 19, 2016. Check the license (California A140369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hilary Ong
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A140369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4650 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 361-2122
- Enumerated
- May 19, 2016
- Record last updated
- May 19, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 4650 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Hilary Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A140369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Hilary Ong among 9,272 pediatrics physician records in California
Hilary Ong is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 81% of them.
- NPI issued2016 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2016 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
919 pediatrics physician records list a practice address in Los Angeles
They are 919 of the 69,537 NPPES records with a practice address in Los Angeles, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Los Angeles → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Lamis Al-Ahmad, M.D.Los Angeles, CA 900271356445522
- Eyal Ben-Isaac, MDLos Angeles, CA 900271689779597
- Clement Cheung, M.D., PH.D.Los Angeles, CA 900271437165826
- Edward Epstein, M.D.Los Angeles, CA 900271568420768
- Joyce Javier, MDLos Angeles, CA 900271033172754
- Richard Ko, M.D.Los Angeles, CA 900271003841693
- Jill Lekovic, M.D.Los Angeles, CA 900271265543185
- Kanokporn Mongkolrattanothai, MDLos Angeles, CA 900271174592950
Common questions
What is Hilary Ong's NPI number?
Hilary Ong's National Provider Identifier (NPI) is 1053768093, issued on May 19, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Hilary Ong located?
The NPPES record lists a practice address at 4650 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 361-2122. Providers update this record themselves, so call before visiting.
How can I verify Hilary Ong's license?
NPPES lists California license number A140369, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Hilary Ong's MIPS final score?
The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.