Stephen Ou, MD
Student in an Organized Health Care Education/Training Program · Diamond Bar, CA
Stephen Ou, MD is a student in an organized health care education/training program with a practice address in Diamond Bar, California, and NPI 1669763439, issued on Apr 27, 2011. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephen Ou
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 2582 Steeplechase LN, Diamond Bar, CA 91765
- Phone
- (909) 612-4390
- Enumerated
- Apr 27, 2011
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160914001624); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2011
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Verify Stephen Ou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.8 times the Medicare Part D claims of the average student in an organized health care education/training program in 2024
1,079 Medicare Part D claims for 248 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Levothyroxine Sodium256 claims
- Alendronate Sodium167 claims
- Methimazole91 claims
- Forteo58 claims
- Ozempic50 claims
- Testosterone46 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Ou among 40,652 student in an organized health care education/training program records in California
Stephen Ou, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 4% of them.
- NPI issued2011 · 4% of these records are older, 95% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 6% of these records are
- Graduated2011 · median 2017 among the 2,409 with a school on file
- Record last updated2021 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 student in an organized health care education/training program records list a practice address in Diamond Bar
They are 9 of the 598 NPPES records with a practice address in Diamond Bar, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Diamond Bar → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Tanzim ArastuDiamond Bar, CA 917651891035804
- Faisal Butt, M.SCDiamond Bar, CA 917651023423902
- Michael FarahDiamond Bar, CA 917651255034310
- Elizabeth NgoDiamond Bar, CA 917651245111616
- Krystal NguyenDiamond Bar, CA 917651215873393
- Woochul ShinDiamond Bar, CA 917651992947485
- Matthew TajimaDiamond Bar, CA 917651215815386
- Yu-Wen Wang, DDSDiamond Bar, CA 917651093004749
Common questions
What is Stephen Ou, MD's NPI number?
Stephen Ou, MD's National Provider Identifier (NPI) is 1669763439, issued on Apr 27, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Ou, MD located?
The NPPES record lists a practice address at 2582 Steeplechase LN, Diamond Bar, CA, 91765. Phone: (909) 612-4390. Providers update this record themselves, so call before visiting.
How can I verify Stephen Ou, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Stephen Ou, MD prescribe under Medicare Part D?
In 2024, Stephen Ou, MD had 1,079 Medicare Part D claims for 248 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. 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.