Elinor L. Baron, M.D.
Infectious Disease Physician · Newton, MA
Elinor L. Baron, M.D. is an infectious disease physician with a practice address in Newton, Massachusetts, and NPI 1366537581, issued on Oct 4, 2006. Check the license (Massachusetts 230261, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Elinor L. Baron
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 230261 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2000 Washington St, Suite 301, Newton, MA 02215
- Phone
- (617) 965-1717
- Enumerated
- Oct 4, 2006
- Record last updated
- Aug 31, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071002000546); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 487 in Massachusetts → Look up another NPI →
Verify Elinor L. Baron in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 230261Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mass General Brigham Medical Group Suburban Massachusetts IncNewton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Elinor L. Baron among 487 infectious disease physician records in Massachusetts
Elinor L. Baron, M.D. is one of 487 infectious disease physician records with a practice address in Massachusetts. 69% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 47% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2002 · median 2003 among the 296 with a school on file
- Record last updated2009 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Massachusetts
There are 487 infectious disease physician records in Massachusetts.
All 487 in Massachusetts → Every provider in Newton → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Dan Barouch, MD PHDBoston, MA 022151992786974
- Sigall Bell, M.D.Boston, MA 022151225143118
- Clyde Crumpacker, M.D.Boston, MA 022151780786103
- George Eliopoulos, M.D.Boston, MA 022151891732087
- Camilla Graham, M.D.Boston, MA 022151952416919
- Adolf Karchmer, M.D.Boston, MA 022151508890278
- Kwan Kew Lai, MDBoston, MA 022151881618353
- Todd Pollack, M.D.Boston, MA 022151720026081
Common questions
What is Elinor L. Baron, M.D.'s NPI number?
Elinor L. Baron, M.D.'s National Provider Identifier (NPI) is 1366537581, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Elinor L. Baron, M.D. located?
The NPPES record lists a practice address at 2000 Washington St, Suite 301, Newton, MA, 02215. Phone: (617) 965-1717. Providers update this record themselves, so call before visiting.
How can I verify Elinor L. Baron, M.D.'s license?
NPPES lists Massachusetts license number 230261, 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. 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.