Peter Alfred Schlesinger, M.D.
Internal Medicine Physician · Cambridge, MA
Peter Alfred Schlesinger, M.D. is an internal medicine physician with a practice address in Cambridge, Massachusetts, and NPI 1265409650, issued on Mar 3, 2006. Check the license (Massachusetts 40898, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Peter Alfred Schlesinger
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 40898 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Cambridge St, Cambridge, MA 02141
- Phone
- (617) 876-1668
- Enumerated
- Mar 3, 2006
- Record last updated
- Mar 26, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (617) 864-0666
- Medicaid ID
- 2083809 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Peter Alfred Schlesinger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 40898Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Peter Alfred Schlesinger among 6,825 internal medicine physician records in Massachusetts
Peter Alfred Schlesinger, 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 not. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileNo · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2013 · 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).
300 internal medicine physician records list a practice address in Cambridge
They are 300 of the 5,145 NPPES records with a practice address in Cambridge, and 6,825 internal medicine physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 6,825 in Massachusetts → Every provider in Cambridge → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jackie Bronico, M.D., MSCCambridge, MA 021411275912164
- Leslie Chun, M.D.Boston, MA 021411093804940
- Cassie Frank, M.D., M.P.H.Cambridge, MA 021411407054984
- Anthony Lee, MDCambridge, MA 021411972557270
- Jia LiuCambridge, MA 021411063857969
- Ian McCart, M.D.Cambridge, MA 021411952362907
- Gunjan Senapati, M.D.Cambridge, MA 021411851523195
- Basmaa Ali, MDCambridge, MA 021421073510822
Common questions
What is Peter Alfred Schlesinger, M.D.'s NPI number?
Peter Alfred Schlesinger, M.D.'s National Provider Identifier (NPI) is 1265409650, issued on Mar 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peter Alfred Schlesinger, M.D. located?
The NPPES record lists a practice address at 1000 Cambridge St, Cambridge, MA, 02141. Phone: (617) 876-1668. Providers update this record themselves, so call before visiting.
How can I verify Peter Alfred Schlesinger, M.D.'s license?
NPPES lists Massachusetts license number 40898, 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. 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.