Robert Hsiao, MD
Internal Medicine Physician · Phoenix, MD
Robert 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 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
- Entity
- Type 1 · individual
Also registered at 3346 Paper Mill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- 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 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).
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 2 in Phoenix → All 3,904 in Maryland → Every provider in Phoenix →
Other internal medicine physician records in Maryland
- Eduardo Abarca Rojas, M.D.Parkville, MD1538447628
- Rasheed Abassi, M.D.Clinton, MD1376608620
- Ghulam Abbas, MDFrederick, MD1477658045
- Shamima Abbas, MDKensington, MD1750445896
- Nourelhuda Abbas Hamed, MDSilver Spring, MD1699339473
- Arsalan Abbasi, MDWestminster, MD1942762604
- Hamdi AbdeenGaithersburg, MD1245972413
- Mukemil Abdella, M.D.Glenn Dale, MD1871603381
- Suzan Abdo, MDClarksville, MD1588631824
- Madeeha Abdul GhaffarElkton, MD1194276063
Common questions
What is Robert Hsiao, MD's NPI number?
Robert 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 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 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 Hsiao, MD prescribe under Medicare Part D?
In 2024, Robert 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), loaded Aug 27, 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) 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 27, 2026.