Sean Maximillian Taasan
Hematology & Oncology Physician · Dallas, TX
Sean Maximillian Taasan is a hematology & oncology physician with a practice address in Dallas, Texas, and NPI 1225599335, issued on Mar 29, 2019. Check the license (Texas T8661, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sean Maximillian Taasan
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- T8661 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6202 Harry Hines Blvd, Dallas, TX 75390
- Phone
- (214) 645-3999
- Enumerated
- Mar 29, 2019
- Record last updated
- Sep 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20250926001789); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 922 in Texas → Look up another NPI →
Also registered at 6202 Harry Hines Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Santiago Alvarez Arango, MD, PHDAllergy & Immunology Physician1881005437
- Shukaib Arslan, M.D.Hematology & Oncology Physician1477867877
- Yu Cao, MDMedical Oncology Physician1942566070
- Victoria Chung, D.O.Hematology & Oncology Physician1568997229
Verify Sean Maximillian Taasan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license T8661Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
104 Medicare Part D claims for 25 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Acyclovir13 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
- University OF Texas Southwestern Medical Center AT DallasDallas, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Maximillian Taasan among 922 hematology & oncology physician records in Texas
Sean Maximillian Taasan is one of 922 hematology & oncology physician records with a practice address in Texas. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 93% of them.
- NPI issued2019 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2019 · median 2004 among the 691 with a school on file
- Record last updated2025 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Texas
There are 922 hematology & oncology physician records in Texas.
All 922 in Texas → Every provider in Dallas → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Mary Auchus, MDDallas, TX 753901235198359
- David Auerbach, MDDallas, TX 753901205896297
- Robert Collins, MDDallas, TX 753901851350979
- Kevin Courtney, M.D.Dallas, TX 753901346215001
- Jonathan Dowell, MDDallas, TX 753901497724983
- Barbara Haley, MDDallas, TX 753901518936087
- Sandra Hofmann, MD PHDDallas, TX 753901306805437
- Randall Hughes, MDDallas, TX 753901417916537
Common questions
What is Sean Maximillian Taasan's NPI number?
Sean Maximillian Taasan's National Provider Identifier (NPI) is 1225599335, issued on Mar 29, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Sean Maximillian Taasan located?
The NPPES record lists a practice address at 6202 Harry Hines Blvd, Dallas, TX, 75390. Phone: (214) 645-3999. Providers update this record themselves, so call before visiting.
How can I verify Sean Maximillian Taasan's license?
NPPES lists Texas license number T8661, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sean Maximillian Taasan prescribe under Medicare Part D?
In 2024, Sean Maximillian Taasan had 104 Medicare Part D claims for 25 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.