Johnson Ong, DO
Rheumatology Physician · Loma Linda, CA
Johnson Ong, DO is a rheumatology physician with a practice address in Loma Linda, California, and NPI 1568045508, issued on Apr 28, 2021. Check the license (California 20A22465, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Johnson Ong
- Credential
- DO
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A22465 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11370 Anderson St # 3650, Loma Linda, CA 92354
- Phone
- (909) 558-2860
- Enumerated
- Apr 28, 2021
- Record last updated
- Jul 27, 2026
- Medicare enrollment
- Enrolled (PECOS I20260611002517); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Verify Johnson Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A22465Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average rheumatology physician in 2024
201 Medicare Part D claims for 77 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 17 claims were for opioids.
Most prescribed
- Trazodone Hcl13 claims
- Myrbetriq11 claims
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.
Industry payments in 2024: $433.33
4 payments; by number, the most common kind was food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Johnson Ong among 926 rheumatology physician records in California
Johnson Ong, DO is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 98% of them.
- NPI issued2021 · 98% of these records are older, under 1% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2021 · median 2003 among the 641 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Loma Linda → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Abdalhamid Al Harash, M.D., FACPLoma Linda, CA 923541962790618
- Anoop Bhatt, M.D.Loma Linda, CA 923541255714929
- Nicole Bitencourt, MDLoma Linda, CA 923541386878700
- Keith Colburn, M.D.Loma Linda, CA 923541477570869
- Christina Downey, M.D.Loma Linda, CA 923541558625285
- Joanne Kang, M.D.Loma Linda, CA 923541972523793
- John Rambharose, M.D.Loma Linda, CA 923541184841272
- Vaneet Sandhu, M.D.Loma Linda, CA 923541134362163
Common questions
What is Johnson Ong, DO's NPI number?
Johnson Ong, DO's National Provider Identifier (NPI) is 1568045508, issued on Apr 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Johnson Ong, DO located?
The NPPES record lists a practice address at 11370 Anderson St # 3650, Loma Linda, CA, 92354. Phone: (909) 558-2860. Providers update this record themselves, so call before visiting.
How can I verify Johnson Ong, DO's license?
NPPES lists California license number 20A22465, 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.
How much does Johnson Ong, DO prescribe under Medicare Part D?
In 2024, Johnson Ong, DO had 201 Medicare Part D claims for 77 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.
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.