Harold Hsu, M.D.
Internal Medicine Physician · Rosemead, CA
Harold Hsu, M.D. is an internal medicine physician with a practice address in Rosemead, California, and NPI 1770508111, issued on Jul 13, 2006. Check the license (California A 51859, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Harold Hsu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A 51859 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8622 Garvey Ave, Rosemead, CA 91770
- Phone
- (626) 280-6898
- Enumerated
- Jul 13, 2006
- Record last updated
- Feb 27, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (626) 280-6899
- Medicaid ID
- 00A518590 CA
- Medicare enrollment
- Enrolled (PECOS I20100429000159); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 8622 Garvey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Wong, MDInternal Medicine Physician1124020623
Verify Harold Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A 51859Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15.9 times the Medicare Part D claims of the average internal medicine physician in 2024
50,462 Medicare Part D claims for 848 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 305 claims were for opioids.
Most prescribed
- Atorvastatin Calcium3,261 claims
- Amlodipine Besylate2,115 claims
- Telmisartan1,387 claims
- Omeprazole1,265 claims
- Olmesartan Medoxomil1,171 claims
- Metoprolol Succinate1,038 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: $105.79
4 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. 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.
Harold Hsu among 17,696 internal medicine physician records in California
Harold 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 fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
14 internal medicine physician records list a practice address in Rosemead
They are 14 of the 839 NPPES records with a practice address in Rosemead, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Rosemead → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Andy Chen, MDRosemead, CA 917701831153659
- Kelvin Chen, MDRosemead, CA 917701225387137
- Josephine Choa, M.D.Rosemead, CA 917701356384408
- Han Duong, M.D.& D.O.Rosemead, CA 917701013070234
- Susan Heller, M.D.Rosemead, CA 917701720251929
- Son Le, M.D.Rosemead, CA 917701942290762
- Tam Le, M.DRosemead, CA 917701154480077
- Hong Liang, M.D.Rosemead, CA 917701598784340
Common questions
What is Harold Hsu, M.D.'s NPI number?
Harold Hsu, M.D.'s National Provider Identifier (NPI) is 1770508111, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Harold Hsu, M.D. located?
The NPPES record lists a practice address at 8622 Garvey Ave, Rosemead, CA, 91770. Phone: (626) 280-6898. Providers update this record themselves, so call before visiting.
How can I verify Harold Hsu, M.D.'s license?
NPPES lists California license number A 51859, 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 Harold Hsu, M.D. prescribe under Medicare Part D?
In 2024, Harold Hsu, M.D. had 50,462 Medicare Part D claims for 848 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.