NPPES file of Aug 9, 2026

Stephen Louis Boswell, M.D.

Internal Medicine Physician · Boston, MA

Stephen Louis Boswell, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1477541217, issued on Oct 6, 2005. Check the license (Massachusetts 56428, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1477541217
Name
Stephen Louis Boswell
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
56428 MA
Self-reported in NPPES; status is on the state search
Practice location
1340 Boylston St, Boston, MA 02215
Phone
(617) 927-6171
Enumerated
Oct 6, 2005
Record last updated
Jan 26, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(617) 425-5714
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →

Also registered at 1340 Boylston St

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

  1. Pamela Adelstein, MDFamily Medicine Physician1306822416
  2. Emily Aduba, FNP-BCFamily Nurse Practitioner1831617315
  3. Adam Albano, M.D.Internal Medicine Physician1558689828
  4. Christopher Alonzo, M.D., MPHInternal Medicine Physician1265812226
  5. Isabella Anderson, MSWSocial Worker1528701315
  6. Sophia AxtmanFamily Nurse Practitioner1902452022

Verify Stephen Louis Boswell 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 56428    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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Stephen Louis Boswell among 6,825 internal medicine physician records in Massachusetts

Stephen Louis Boswell, M.D. 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 not. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 88% newer
  • In a Medicare fileNo · 75% of these records are
  • In the CMS Doctors and Clinicians fileNo · 60% of these records are
  • Record last updated2012 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Jennifer Cluett, MDBoston, MA 022151962491183
  2. Jan Cook, M.D.Boston, MA 022151437152139
  3. Rachel Freedman, M.D.Boston, MA 022151942297189
  4. Joseph Gesmundo, MDBoston, MA 022151891785069
  5. Alex Gonzalez, MD, MPHBoston, MA 022151134101629
  6. Scott Harris, MDBoston, MA 022151871581694
  7. Joseph Li, M.D.Boston, MA 022151043209380
  8. Timothy Loo, M.D.Boston, MA 022151871584813

Common questions

What is Stephen Louis Boswell, M.D.'s NPI number?

Stephen Louis Boswell, M.D.'s National Provider Identifier (NPI) is 1477541217, issued on Oct 6, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Louis Boswell, M.D. located?

The NPPES record lists a practice address at 1340 Boylston St, Boston, MA, 02215. Phone: (617) 927-6171. Providers update this record themselves, so call before visiting.

How can I verify Stephen Louis Boswell, M.D.'s license?

NPPES lists Massachusetts license number 56428, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.