Katrina Hsieh, DO
Internal Medicine Physician · Gaithersburg, MD
Katrina Hsieh, DO is an internal medicine physician with a practice address in Gaithersburg, Maryland, and NPI 1326626250, issued on Mar 31, 2021. Check the license (Maryland H97606, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Katrina Hsieh
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- H97606 MD
Self-reported in NPPES; status is on the state search - Practice location
- 655 Watkins Mill RD, Gaithersburg, MD 20879
- Phone
- (240) 632-4021
- Enumerated
- Mar 31, 2021
- Record last updated
- May 16, 2024
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
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Verify Katrina Hsieh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H97606Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
296 Medicare Part D claims for 63 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium43 claims
- Losartan Potassium23 claims
- Amlodipine Besylate20 claims
- Lisinopril20 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.
Katrina Hsieh among 3,904 internal medicine physician records in Maryland
Katrina Hsieh, DO 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 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2024 · 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).
67 internal medicine physician records list a practice address in Gaithersburg
They are 67 of the 2,580 NPPES records with a practice address in Gaithersburg, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Gaithersburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Julie Chen, M.D.Gaithersburg, MD 208791629048467
- Jose De Leon Carpio, MDGaithersburg, MD 208791275682320
- Lingling Gao, D.O.Gaithersburg, MD 208791285959932
- Jean Hou, MDGaithersburg, MD 208791750442273
- Shailini Jain, MDGaithersburg, MD 208791588711022
- Supriya Janakiraman, M.D., M.P.H.Gaithersburg, MD 208791114361672
- Poonam Maru, DO, FACPGaithersburg, MD 208791780974329
- Joseph McClain, M.D.Gaithersburg, MD 208791194968297
Common questions
What is Katrina Hsieh, DO's NPI number?
Katrina Hsieh, DO's National Provider Identifier (NPI) is 1326626250, issued on Mar 31, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Katrina Hsieh, DO located?
The NPPES record lists a practice address at 655 Watkins Mill RD, Gaithersburg, MD, 20879. Phone: (240) 632-4021. Providers update this record themselves, so call before visiting.
How can I verify Katrina Hsieh, DO's license?
NPPES lists Maryland license number H97606, 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 Katrina Hsieh, DO prescribe under Medicare Part D?
In 2024, Katrina Hsieh, DO had 296 Medicare Part D claims for 63 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.