NPPES file of Aug 9, 2026

Daniel Samuel Thomas, MD

Geriatric Medicine (Internal Medicine) Physician · Boston, MA

Daniel Samuel Thomas, MD is a geriatric medicine (internal medicine) physician with a practice address in Boston, Massachusetts, and NPI 1427624717, issued on May 27, 2021. Check the license (Massachusetts 1026321, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1427624717
Name
Daniel Samuel Thomas
Credential
MD
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License numbers
1026321 MA
MD489019 PA
Self-reported in NPPES; status is on the state search
Practice location
55 Fruit St, Boston, MA 02114
Phone
(617) 726-4600
Enumerated
May 27, 2021
Record last updated
Jun 27, 2026
Medicare enrollment
Enrolled (PECOS I20250712000461); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 225 in Massachusetts → Look up another NPI →

Also registered at 55 Fruit St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Affan Aamir, MD, PHARMD, RPHStudent in an Organized Health Care Education/Training Program1821890377
  2. Matthew AbadirAnesthesiology Physician1699120550
  3. Taimur AbbasiInternal Medicine Physician1841673522
  4. Megan Abbott, MDAnesthesiology Physician1730839333
  5. Moustafa AbdallaStudent in an Organized Health Care Education/Training Program1952046062
  6. Shadi Abdar Esfahani, MD, MPHDiagnostic Radiology Physician1497137590

Verify Daniel Samuel Thomas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 1026321    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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91% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

372 Medicare Part D claims for 91 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. 13 claims were for opioids.

  1. Daniel Thomas372
  2. Specialty average4,246

Most prescribed

  1. Atorvastatin Calcium43 claims
  2. Sertraline Hcl19 claims
  3. Amlodipine Besylate18 claims
  4. Duloxetine Hcl18 claims
  5. Metoprolol Succinate15 claims
  6. Losartan Potassium11 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

  1. The Milton S Hershey Medical Center Physicians GroupHershey, PA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Daniel Samuel Thomas among 225 geriatric medicine (internal medicine) physician records in Massachusetts

Daniel Samuel Thomas, MD is one of 225 geriatric medicine (internal medicine) physician records with a practice address in Massachusetts. 71% 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 95% of them.

  • NPI issued2021 · 95% of these records are older, 3% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated2021 · median 2000 among the 119 with a school on file
  • Record last updated2026 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Massachusetts

There are 225 geriatric medicine (internal medicine) physician records in Massachusetts.

All 225 in Massachusetts → Every provider in Boston → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Warren Backman, MBBSBoston, MA 021141174910574
  2. Elizabeth Castillo, MD PHDBoston, MA 021141932176443
  3. Sevdenur Cizginer Konuk, MD, MPHBoston, MA 021141881906725
  4. Kent Creamer, MDBoston, MA 021141730136508
  5. Ana Cecilia Cury, M.D.Boston, MA 021141437290210
  6. Esteban Franco Garcia, M.DBoston, MA 021141861712648
  7. Kathryn Hanley, M.D.Boston, MA 021141396079307
  8. Ardeshir Hashmi, M.D.Boston, MA 021141619143492

Common questions

What is Daniel Samuel Thomas, MD's NPI number?

Daniel Samuel Thomas, MD's National Provider Identifier (NPI) is 1427624717, issued on May 27, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Daniel Samuel Thomas, MD located?

The NPPES record lists a practice address at 55 Fruit St, Boston, MA, 02114. Phone: (617) 726-4600. Providers update this record themselves, so call before visiting.

How can I verify Daniel Samuel Thomas, MD's license?

NPPES lists Massachusetts license number 1026321, 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 Daniel Samuel Thomas, MD prescribe under Medicare Part D?

In 2024, Daniel Samuel Thomas, MD had 372 Medicare Part D claims for 91 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.