Tanguy Yann Seiwert, M.D.
Medical Oncology Physician · Baltimore, MD
Tanguy Yann Seiwert, M.D. is a medical oncology physician with a practice address in Baltimore, Maryland, and NPI 1043340292, issued on Mar 6, 2007. Check the license (Maryland D88003, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Tanguy Yann Seiwert
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- D88003 MD
Self-reported in NPPES; status is on the state search - Practice location
- 9910 Franklin Square Dr Ste 2110, Baltimore, MD 21236
- Phone
- (410) 933-6423
- Enumerated
- Mar 6, 2007
- Record last updated
- Aug 12, 2025
- Medicare enrollment
- Enrolled (PECOS I20190829000016); may accept Medicare assignment
- Entity
- Type 1 · individual
Also registered at 9910 Franklin Square Dr Ste 2110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Levy, MDHematology & Oncology Physician1346276326
Verify Tanguy Yann Seiwert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D88003Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average medical oncology physician in 2024
203 Medicare Part D claims for 50 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Levothyroxine Sodium47 claims
- Prochlorperazine Maleate37 claims
- Dexamethasone23 claims
- Oxycodone Hcl17 claims
- Ondansetron Hcl11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 74.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $18,470.00
6 payments; by number, the most common kind was consulting fee; the largest payer was Merck Sharp & Dohme LLC. The 3,343 providers of this specialty with any payment received $11,773.47 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.
Bills Medicare through one group practice
- Johns Hopkins UniversityColumbia, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Oncology Physician providers in Maryland
There are 224 medical oncology physician records in Maryland.
Other medical oncology physician records in Maryland
- Jeffrey Abrams, M.DClarksville, MD1598035248
- Richard Ambinder, M.D.Baltimore, MD1528022407
- Amir Ameri, MDBaltimore, MD1164089843
- Valsamo Anagnostou, MD-PHDBaltimore, MD1821314030
- Christina Annunziata, M.D., PH.D.Bethesda, MD1093084139
- Mary Armanios, M.D.Baltimore, MD1588628390
- Deborah Armstrong, M.D.Lutherville, MD1437113255
- Kekule AsgariSilver Spring, MD1568927911
- Nilofer Azad, MDBaltimore, MD1568635712
- Ashraf Badros, M.D.Baltimore, MD1821038241
Common questions
What is Tanguy Yann Seiwert, M.D.'s NPI number?
Tanguy Yann Seiwert, M.D.'s National Provider Identifier (NPI) is 1043340292, issued on Mar 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tanguy Yann Seiwert, M.D. located?
The NPPES record lists a practice address at 9910 Franklin Square Dr Ste 2110, Baltimore, MD, 21236. Phone: (410) 933-6423. Providers update this record themselves, so call before visiting.
How can I verify Tanguy Yann Seiwert, M.D.'s license?
NPPES lists Maryland license number D88003, 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 Tanguy Yann Seiwert, M.D. prescribe under Medicare Part D?
In 2024, Tanguy Yann Seiwert, M.D. had 203 Medicare Part D claims for 50 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Tanguy Yann Seiwert, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.