Robert Y. Hsiao, MD
Internal Medicine Physician · Phoenix, MD
Robert Y. Hsiao, MD is an internal medicine physician with a practice address in Phoenix, Maryland, and NPI 1396700514, issued on Apr 19, 2006. Check the license (Maryland D0035305, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Robert Y. Hsiao
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0035305 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3346 Paper Mill RD, Phoenix, MD 21131
- Phone
- (410) 666-4060
- Enumerated
- Apr 19, 2006
- Record last updated
- Feb 21, 2022
- Medicaid ID
- 210811900 MD
- Medicare enrollment
- Enrolled (PECOS I20050106000293); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 3346 Paper Mill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Ashley, CRNPAdult Health Nurse Practitioner1548966013
- Tu Cao, D.O.Family Medicine Physician1063607232
- Sara Chappelear, LCSW-CClinical Social Worker1114324209
- Laura Cox, CRNPFamily Nurse Practitioner1982195269
- Shilpa Das, DOFamily Medicine Physician1023646320
- Luisa Massari, M.D.Family Medicine Physician1225075567
Verify Robert Y. Hsiao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0035305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
397 Medicare Part D claims for 236 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Doxycycline Hyclate34 claims
- Azithromycin22 claims
- Rosuvastatin Calcium17 claims
- Amoxicillin15 claims
- Amoxicillin-Clavulanate Potass13 claims
- Polymyxin B Sul-Trimethoprim13 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 2 group practices
- Medstar Medical Group II LLCBaltimore, MD
- Patient First Maryland Medical Group PLLCOwings Mills, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Y. Hsiao among 3,904 internal medicine physician records in Maryland
Robert Y. Hsiao, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 55% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2003 among the 2,445 with a school on file
- Record last updated2022 · 59% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 internal medicine physician records list a practice address in Phoenix
They are 2 of the 81 NPPES records with a practice address in Phoenix, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Phoenix → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joan Edwards, MDPhoenix, MD 211311679653489
- Ambalavanan Balasubramanian, MDRandallstown, MD 211331184799066
- Raynold Depestre, MDRandallstown, MD 211331831291285
- Avverahalli Harish, M.D.Randallstown, MD 211331295796316
- Joginder Mehta, M.D.Randallstown, MD 211331992767453
- Joseph Nkwanyuo, M.D.Randallstown, MD 211331194805036
- Elvira Pasmanik, M.D.Randallstown, MD 211331316945652
- Trung Pham, M.D.Randallstown, MD 211331669491999
Common questions
What is Robert Y. Hsiao, MD's NPI number?
Robert Y. Hsiao, MD's National Provider Identifier (NPI) is 1396700514, issued on Apr 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Y. Hsiao, MD located?
The NPPES record lists a practice address at 3346 Paper Mill RD, Phoenix, MD, 21131. Phone: (410) 666-4060. Providers update this record themselves, so call before visiting.
How can I verify Robert Y. Hsiao, MD's license?
NPPES lists Maryland license number D0035305, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Y. Hsiao, MD prescribe under Medicare Part D?
In 2024, Robert Y. Hsiao, MD had 397 Medicare Part D claims for 236 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.