NPPES file of Aug 9, 2026

Richard Y. Ong, M.D.

Specialist · Santa Ana, CA

Richard Y. Ong, M.D. is a specialist with a practice address in Santa Ana, California, and NPI 1881629251, issued on Jul 12, 2006. Check the license (California A33718, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1881629251
Name
Richard Y. Ong
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
A33718 CA
Self-reported in NPPES; status is on the state search
Practice location
1626 S Broadway, Santa Ana, CA 92707
Phone
(714) 541-2639
Enumerated
Jul 12, 2006
Record last updated
May 1, 2009 (not updated in 17 years: call before relying on the address or phone)
Fax
(888) 212-7464
Medicaid ID
00A337180 CA
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest specialist records → All 5,749 in California → Look up another NPI →

Also registered at 1626 S Broadway

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Audrey Ong, M.D.Specialist1033144365

Verify Richard Y. Ong in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license A33718    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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99% fewer Medicare Part D claims than the average specialist in 2024

14 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D.

  1. Richard Ong14
  2. Specialty average1,380

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Richard Y. Ong among 5,749 specialist records in California

Richard Y. Ong, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 60% newer
  • In a Medicare fileYes · 30% of these records are
  • In the CMS Doctors and Clinicians fileNo · 19% of these records are
  • Record last updated2009 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California.

All 5,749 in California → Every provider in Santa Ana → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Zarshid Arbabi, M.D.Santa Ana, CA 927071366693954
  2. Mansoor Mosley, MDSanta Ana, CA 927071770675357
  3. Audrey Ong, M.D.Santa Ana, CA 927071033144365
  4. Amer Zarka, M.D.Santa Ana, CA 927071629096664
  5. Viet Be, M.D.Fountain Valley, CA 927081437118650
  6. Philip Chin, M.D.Fountain Valley, CA 927081548224629
  7. Himmet Dajee, MDFountain Valley, CA 927081124082730
  8. Kelly Francis, M.D.Fountain Valley, CA 927081497719504

Common questions

What is Richard Y. Ong, M.D.'s NPI number?

Richard Y. Ong, M.D.'s National Provider Identifier (NPI) is 1881629251, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Richard Y. Ong, M.D. located?

The NPPES record lists a practice address at 1626 S Broadway, Santa Ana, CA, 92707. Phone: (714) 541-2639. Providers update this record themselves, so call before visiting.

How can I verify Richard Y. Ong, M.D.'s license?

NPPES lists California license number A33718, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Richard Y. Ong, M.D. prescribe under Medicare Part D?

In 2024, Richard Y. Ong, M.D. had 14 Medicare Part D claims; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.