Cary G. Pfeffer, M.D.
Internal Medicine Physician · Lexington, MA
Cary G. Pfeffer, M.D. is an internal medicine physician with a practice address in Lexington, Massachusetts, and NPI 1841330446, issued on Feb 6, 2007. Check the license (Massachusetts 76889, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Cary G. Pfeffer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 76889 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Munroe RD, Lexington, MA 02421
- Phone
- (781) 863-0778
- Enumerated
- Feb 6, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Cary G. Pfeffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 76889Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $15.00
1 payment: food and beverage; the largest payer was Novo Nordisk AS. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Cary G. Pfeffer among 6,825 internal medicine physician records in Massachusetts
Cary G. Pfeffer, 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. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 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).
36 internal medicine physician records list a practice address in Lexington
They are 36 of the 1,467 NPPES records with a practice address in Lexington, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Lexington → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Steven Abreu, M.D.Lexington, MA 024211790758266
- Gail Corson, MDLexington, MA 024211750314563
- Jennifer Daley, M.D.Lexington, MA 024211508923574
- Morris Dratch, M.D.Lexington, MA 024211760583108
- Daniel Erler, MD MPHLexington, MA 024211598716862
- Elaine Grunberg, M.D.Lexington, MA 024211922249218
- Eric Guardino, M.D.Lexington, MA 024211497880207
- Margot HartunianLexington, MA 024211154312791
Common questions
What is Cary G. Pfeffer, M.D.'s NPI number?
Cary G. Pfeffer, M.D.'s National Provider Identifier (NPI) is 1841330446, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Cary G. Pfeffer, M.D. located?
The NPPES record lists a practice address at 1 Munroe RD, Lexington, MA, 02421. Phone: (781) 863-0778. Providers update this record themselves, so call before visiting.
How can I verify Cary G. Pfeffer, M.D.'s license?
NPPES lists Massachusetts license number 76889, 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.