Leslie A. Vensel, MD
Internal Medicine Physician · Waltham, MA
Leslie A. Vensel, MD is an internal medicine physician with a practice address in Waltham, Massachusetts, and NPI 1336139021, issued on Oct 25, 2005. Check the license (Massachusetts 57348, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Leslie A. Vensel
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 57348 MA
Self-reported in NPPES; status is on the state search - Practice location
- 40 2ND Ave, Waltham, MA 02451
- Phone
- (781) 487-4350
- Enumerated
- Oct 25, 2005
- Record last updated
- Jun 3, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (781) 487-4351
- Medicaid ID
- 3054799 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 40 2ND Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leslie A. Vensel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 57348Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average internal medicine physician in 2024
3,113 Medicare Part D claims for 309 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 82 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium274 claims
- Atorvastatin Calcium196 claims
- Levothyroxine Sodium170 claims
- Amlodipine Besylate117 claims
- Metformin Hcl Er110 claims
- Hydrochlorothiazide90 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.
Leslie A. Vensel among 6,825 internal medicine physician records in Massachusetts
Leslie A. Vensel, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2014 · 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
- Devasena Balasubramaniam, M.D.Waltham, MA 024511396936498
- Elenie Bartzokis, M.D.Waltham, MA 024511992827067
- Thomas Fry, MDWaltham, MA 024511588763908
- Bard Geesaman, M.D.Waltham, MA 024511790929123
- Christina Gelev, MDWaltham, MA 024511518958131
- Nathaniel Gunn, M.D.Waltham, MA 024511912041963
- Brittany Hansen, MDWaltham, MA 024511508515297
- Steven Kanner, MDWaltham, MA 024511740270289
Common questions
What is Leslie A. Vensel, MD's NPI number?
Leslie A. Vensel, MD's National Provider Identifier (NPI) is 1336139021, issued on Oct 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Leslie A. Vensel, MD located?
The NPPES record lists a practice address at 40 2ND Ave, Waltham, MA, 02451. Phone: (781) 487-4350. Providers update this record themselves, so call before visiting.
How can I verify Leslie A. Vensel, MD's license?
NPPES lists Massachusetts license number 57348, 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 Leslie A. Vensel, MD prescribe under Medicare Part D?
In 2024, Leslie A. Vensel, MD had 3,113 Medicare Part D claims for 309 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.