Michael K. Ong, MD
Internal Medicine Physician · Los Angeles, CA
Michael K. Ong, MD is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1598785776, issued on Jul 20, 2006. Check the license (California A79364, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael K. Ong
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A79364 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Medical Plaza, Los Angeles, CA 90095
- Phone
- (310) 206-6232
- Enumerated
- Jul 20, 2006
- Record last updated
- Jul 13, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 00A793640 CA
- Medicare enrollment
- Enrolled (PECOS I20050915000767); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
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Also registered at 200 Medical Plaza
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael K. Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
610 Medicare Part D claims for 40 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium61 claims
- Hydrochlorothiazide28 claims
- Levothyroxine Sodium25 claims
- Alprazolam17 claims
- Ketoconazole17 claims
- Tamsulosin Hcl17 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: $16.86
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael K. Ong among 17,696 internal medicine physician records in California
Michael K. Ong, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2000 · median 2004 among the 11,065 with a school on file
- Record last updated2010 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
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Common questions
What is Michael K. Ong, MD's NPI number?
Michael K. Ong, MD's National Provider Identifier (NPI) is 1598785776, issued on Jul 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael K. Ong, MD located?
The NPPES record lists a practice address at 200 Medical Plaza, Los Angeles, CA, 90095. Phone: (310) 206-6232. Providers update this record themselves, so call before visiting.
How can I verify Michael K. Ong, MD's license?
NPPES lists California license number A79364, 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 Michael K. Ong, MD prescribe under Medicare Part D?
In 2024, Michael K. Ong, MD had 610 Medicare Part D claims for 40 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.