Karen Marcela St. Jean, MD
Endocrinology, Diabetes & Metabolism Physician · Burlington, MA
Karen Marcela St. Jean, MD is an endocrinology, diabetes & metabolism physician with a practice address in Burlington, Massachusetts, and NPI 1083173124, issued on Mar 18, 2019. Check the license (Massachusetts 1020264, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Karen Marcela St. Jean
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 1020264 MA
Self-reported in NPPES; status is on the state search - Practice location
- 41 Mall RD, Burlington, MA 01805
- Phone
- (781) 744-8000
- Enumerated
- Mar 18, 2019
- Record last updated
- Jul 9, 2024
- Medicare enrollment
- Enrolled (PECOS I20240718001160); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 522 in Massachusetts → Look up another NPI →
Also registered at 41 Mall RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Juliet Aborn, REGISTERED NURSECertified Registered Nurse Anesthetist1932727930
- Omar Abuqamar, M.D., M.M.S.C.,Ophthalmology Physician1437640414
- Emily Adams, PA-CPhysician Assistant1457685752
- Oluwaseun Adebagbo, MDStudent in an Organized Health Care Education/Training Program1588468755
- Christopher Adler, PAPhysician Assistant1972848463
- Tinamarie Adly, NPFamily Nurse Practitioner1154041572
Verify Karen Marcela St. Jean in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1020264Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
573 Medicare Part D claims for 190 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Alendronate Sodium51 claims
- Levothyroxine Sodium46 claims
- Ozempic42 claims
- Jardiance37 claims
- Metformin Hcl Er33 claims
- Trulicity26 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
- Lahey Clinic IncPeabody, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Marcela St. Jean among 522 endocrinology, diabetes & metabolism physician records in Massachusetts
Karen Marcela St. Jean, MD is one of 522 endocrinology, diabetes & metabolism physician records with a practice address in Massachusetts. 82% 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 92% of them.
- NPI issued2019 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2012 · median 2002 among the 378 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Massachusetts
There are 522 endocrinology, diabetes & metabolism physician records in Massachusetts.
All 522 in Massachusetts → Every provider in Burlington → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Antoine Arkieh, M.D.Burlington, MA 018051124129762
- Eugene Clerkin, MDBurlington, MA 018051194823104
- Gary Cushing, MDBurlington, MA 018051578661583
- Dinamarie Garcia Banigan, MD MPHBurlington, MA 018051871502070
- Ameya Hodarkar, MDBurlington, MA 018051467893826
- Mary Beth Hodge, MDBurlington, MA 018051447357272
- Iqra Javeed, M.D.Burlington, MA 018051568884559
- M. James Lenhard, MDBurlington, MA 018051245218148
Common questions
What is Karen Marcela St. Jean, MD's NPI number?
Karen Marcela St. Jean, MD's National Provider Identifier (NPI) is 1083173124, issued on Mar 18, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Karen Marcela St. Jean, MD located?
The NPPES record lists a practice address at 41 Mall RD, Burlington, MA, 01805. Phone: (781) 744-8000. Providers update this record themselves, so call before visiting.
How can I verify Karen Marcela St. Jean, MD's license?
NPPES lists Massachusetts license number 1020264, 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 Karen Marcela St. Jean, MD prescribe under Medicare Part D?
In 2024, Karen Marcela St. Jean, MD had 573 Medicare Part D claims for 190 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.