Yio-Fan Deborah Hsu, M.D.
Internal Medicine Physician · Orange, CA
Yio-Fan Deborah Hsu, M.D. is an internal medicine physician with a practice address in Orange, California, and NPI 1588989529, issued on Apr 1, 2010. Check the license (California A118854, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yio-Fan Deborah Hsu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A118854 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2501 E Chapman Ave, Orange, CA 92869
- Phone
- (714) 633-1011
- Enumerated
- Apr 1, 2010
- Record last updated
- Nov 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 633-4883
- Medicare enrollment
- Enrolled (PECOS I20150204002170); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2501 E Chapman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Albert Bach, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1922355742
Verify Yio-Fan Deborah Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118854Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
166 Medicare Part D claims for 74 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Amoxicillin-Clavulanate Potass18 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
- Providence Medical FoundationOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yio-Fan Deborah Hsu among 17,696 internal medicine physician records in California
Yio-Fan Deborah 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Aladean Abdrabbo, M.D.Orange, CA 928691578905675
- Saif Al Yaseen, M.D.Orange, CA 928691356684096
- Jay Amin, MDOrange, CA 928691568564193
- Laura Cho, M.D.Orange, CA 928691982790820
- Kathleen Glaspy, M.D.Orange, CA 928691134311186
- John Godes, MDOrange, CA 928691730330572
- Graciela Imbastari, MDOrange, CA 928691801809983
- Hassan Jadid, M.D.Orange, CA 928691104171925
Common questions
What is Yio-Fan Deborah Hsu, M.D.'s NPI number?
Yio-Fan Deborah Hsu, M.D.'s National Provider Identifier (NPI) is 1588989529, issued on Apr 1, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Yio-Fan Deborah Hsu, M.D. located?
The NPPES record lists a practice address at 2501 E Chapman Ave, Orange, CA, 92869. Phone: (714) 633-1011. Providers update this record themselves, so call before visiting.
How can I verify Yio-Fan Deborah Hsu, M.D.'s license?
NPPES lists California license number A118854, 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 Yio-Fan Deborah Hsu, M.D. prescribe under Medicare Part D?
In 2024, Yio-Fan Deborah Hsu, M.D. had 166 Medicare Part D claims for 74 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.