Thomas Dean Sequist, MD
Internal Medicine Physician · Boston, MA
Thomas Dean Sequist, MD is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1982660288, issued on Apr 25, 2006. Check the license (Massachusetts 213432, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Thomas Dean Sequist
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 213432 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1620 Tremont Street, Boston, MA 02120
- Phone
- (617) 525-7509
- Enumerated
- Apr 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101008000932); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 1620 Tremont Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Dean Sequist in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 213432Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average internal medicine physician in 2024
809 Medicare Part D claims for 76 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium79 claims
- Hydrochlorothiazide49 claims
- Metoprolol Succinate49 claims
- Simvastatin47 claims
- Lisinopril45 claims
- Amlodipine Besylate42 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
- Brigham And Womens Physicians Organization IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Dean Sequist among 6,825 internal medicine physician records in Massachusetts
Thomas Dean Sequist, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2004 among the 4,103 with a school on file
- Record last updated2007 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Bowman, MDBoston, MA 021201255398624
- Cheryl Clark, MD, M.S., SDRoxbury Crossing, MA 021201881626042
- Wildon Farwell, MDBoston, MA 021201679686406
- Omar Hasan, MDRoxbury Crossing, MA 021201124072780
- Michelle Johnson, MDRoxbury Crossing, MA 021201598726606
- Salmaan Keshavjee, MD PHDRoxbury Crossing, MA 021201134110638
- Serena Koenig, M.D.Boston, MA 021201215962543
- Lisa Lehmann, M.D.Boston, MA 021201477650083
Common questions
What is Thomas Dean Sequist, MD's NPI number?
Thomas Dean Sequist, MD's National Provider Identifier (NPI) is 1982660288, issued on Apr 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Dean Sequist, MD located?
The NPPES record lists a practice address at 1620 Tremont Street, Boston, MA, 02120. Phone: (617) 525-7509. Providers update this record themselves, so call before visiting.
How can I verify Thomas Dean Sequist, MD's license?
NPPES lists Massachusetts license number 213432, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Dean Sequist, MD prescribe under Medicare Part D?
In 2024, Thomas Dean Sequist, MD had 809 Medicare Part D claims for 76 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.