Diana Hui-Min Hsu, M.D.
Internal Medicine Physician · Downey, CA
Diana Hui-Min Hsu, M.D. is an internal medicine physician with a practice address in Downey, California, and NPI 1720090137, issued on Aug 13, 2006. Check the license (California A62369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diana Hui-Min Hsu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A62369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 12651 Lakewood Blvd, Downey, CA 90242
- Phone
- (562) 861-3111
- Enumerated
- Aug 13, 2006
- Record last updated
- Apr 9, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (562) 861-9721
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 12651 Lakewood Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Goethe Hsu, M.D.Internal Medicine Physician1386656726
- Ying Wu, DDSDentist1053482463
- Zhiyu ZhouDental Hygienist1255681425
Verify Diana Hui-Min Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,349 Medicare Part D claims for 192 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Atorvastatin Calcium115 claims
- Amlodipine Besylate103 claims
- Atenolol91 claims
- Hydralazine Hcl80 claims
- Metformin Hcl75 claims
- Lisinopril58 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.
Diana Hui-Min Hsu among 17,696 internal medicine physician records in California
Diana Hui-Min Hsu, M.D. 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 fileNo · 63% of these records are
- Record last updated2008 · 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).
114 internal medicine physician records list a practice address in Downey
They are 114 of the 3,607 NPPES records with a practice address in Downey, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Downey → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sohail Afra, M.D.Downey, CA 902421023125176
- Ron Chai, M.D.Downey, CA 902421447361316
- Ronald Collins, M.D.Downey, CA 902421235176181
- Rashmi Desai, M.D.Downey, CA 902421801990247
- Basuki Gunawan, M.D.Downey, CA 902421346352473
- Danese Hayes, M.D.Downey, CA 902421689786733
- Goethe Hsu, M.D.Downey, CA 902421386656726
- Nageswari Krishnareddy, MDDowney, CA 902421780785873
Common questions
What is Diana Hui-Min Hsu, M.D.'s NPI number?
Diana Hui-Min Hsu, M.D.'s National Provider Identifier (NPI) is 1720090137, issued on Aug 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Diana Hui-Min Hsu, M.D. located?
The NPPES record lists a practice address at 12651 Lakewood Blvd, Downey, CA, 90242. Phone: (562) 861-3111. Providers update this record themselves, so call before visiting.
How can I verify Diana Hui-Min Hsu, M.D.'s license?
NPPES lists California license number A62369, 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 Diana Hui-Min Hsu, M.D. prescribe under Medicare Part D?
In 2024, Diana Hui-Min Hsu, M.D. had 1,349 Medicare Part D claims for 192 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.