Julie Pfeffer, MD
Internal Medicine Physician · Waltham, MA
Julie Pfeffer, MD is an internal medicine physician with a practice address in Waltham, Massachusetts, and NPI 1083243943, issued on Apr 3, 2020. Check the license (Massachusetts 1014822, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Julie Pfeffer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 1014822 MA
Self-reported in NPPES; status is on the state search - Practice location
- 355 Waverley Oaks RD Ste 200, Waltham, MA 02452
- Phone
- (781) 647-6920
- Enumerated
- Apr 3, 2020
- Record last updated
- Mar 31, 2025
- Medicaid ID
- 110205359A MA
- Medicare enrollment
- Enrolled (PECOS I20231020002484); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Julie 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 1014822Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,669 Medicare Part D claims for 180 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium156 claims
- Lisinopril92 claims
- Amlodipine Besylate91 claims
- Losartan Potassium79 claims
- Metformin Hcl60 claims
- Hydrochlorothiazide59 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
- Mount Auburn Professional Services IncLexington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Julie Pfeffer among 6,825 internal medicine physician records in Massachusetts
Julie Pfeffer, 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 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2020 · median 2004 among the 4,103 with a school on file
- Record last updated2025 · 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).
32 internal medicine physician records list a practice address in Waltham
They are 32 of the 2,111 NPPES records with a practice address in Waltham, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Waltham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rachel Ackerman, MDWaltham, MA 024521376923094
- Mark Drews, MDWaltham, MA 024521184693616
- Matthew Fickie, MDWaltham, MA 024521891897757
- David Margulies, M.D.Waltham, MA 024521942344635
- Philip Reilly, M.D.Waltham, MA 024521871780064
- Jane Silva, M.D.North Waltham, MA 024521003853797
- Elissa Stecker, M.D,Waltham, MA 024521295056000
- Alice Zacarian, M.D.Waltham, MA 024521871580597
Common questions
What is Julie Pfeffer, MD's NPI number?
Julie Pfeffer, MD's National Provider Identifier (NPI) is 1083243943, issued on Apr 3, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Julie Pfeffer, MD located?
The NPPES record lists a practice address at 355 Waverley Oaks RD Ste 200, Waltham, MA, 02452. Phone: (781) 647-6920. Providers update this record themselves, so call before visiting.
How can I verify Julie Pfeffer, MD's license?
NPPES lists Massachusetts license number 1014822, 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 Julie Pfeffer, MD prescribe under Medicare Part D?
In 2024, Julie Pfeffer, MD had 1,669 Medicare Part D claims for 180 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.