Derek Lejeune, MD
Internal Medicine Physician · Boston, MA
Derek Lejeune, MD is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1235791294, issued on Jun 30, 2019. Check the license (Massachusetts 280280, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Derek Lejeune
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 280280 MA
Self-reported in NPPES; status is on the state search - Practice location
- 800 Washington St, Boston, MA 02111
- Phone
- (617) 636-5246
- Enumerated
- Jun 30, 2019
- Record last updated
- Jun 30, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20250806000558); accepts Medicare assignment
- Medical or professional school
- F H Netter, M.D. School Of Med At Quinnipiac Univ, 2019
- 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 800 Washington St
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Verify Derek Lejeune in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 280280Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
43 Medicare Part D claims for 22 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate13 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
- Mass General Brigham Medical Group Northern Massachusetts IncSalem, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Lejeune among 6,825 internal medicine physician records in Massachusetts
Derek Lejeune, 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 2019, is newer than 84% of them.
- NPI issued2019 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2019 · median 2004 among the 4,103 with a school on file
- Record last updated2019 · 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
- Dineli Ahearn, M.D.Boston, MA 021111528015922
- Ethan Balk, M.D.Boston, MA 021111831136571
- Jeanine Carlson, M.D.Boston, MA 021111588603013
- Peter Castaldi, M.D.Boston, MA 021111902891062
- Daniel Chandler, M.D.Boston, MA 021111760440168
- Wambui Chege, M.D.Boston, MA 021111275571549
- Kevin Chin, MDBoston, MA 021111568430593
- Shira Doron, M.D.Boston, MA 021111831121359
Common questions
What is Derek Lejeune, MD's NPI number?
Derek Lejeune, MD's National Provider Identifier (NPI) is 1235791294, issued on Jun 30, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Derek Lejeune, MD located?
The NPPES record lists a practice address at 800 Washington St, Boston, MA, 02111. Phone: (617) 636-5246. Providers update this record themselves, so call before visiting.
How can I verify Derek Lejeune, MD's license?
NPPES lists Massachusetts license number 280280, 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 Derek Lejeune, MD prescribe under Medicare Part D?
In 2024, Derek Lejeune, MD had 43 Medicare Part D claims for 22 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.