Leslie Vensel, MD
NPI 1336139021 · Internal Medicine Physician · Waltham, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leslie Vensel, MD is a Internal Medicine Physician provider in Waltham, MA (NPI 1336139021).
Provider details
- NPI number
- 1336139021
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 57348 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
546 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 137 | $138 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 121 | $141 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 95 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 89 | $196 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 45 | $99 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 274 | 79 |
| Atorvastatin Calcium | 196 | 53 |
| Levothyroxine Sodium | 170 | 46 |
| Amlodipine Besylate | 117 | 41 |
| Metformin Hclbrand: Metformin Hcl Er | 110 | 41 |
| Hydrochlorothiazide | 90 | 31 |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-25
- Last updated
- 2014-06-03
Frequently asked questions
- What is Leslie Vensel's NPI number?
- Leslie Vensel's National Provider Identifier (NPI) is 1336139021, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Vensel's specialty?
- Leslie Vensel is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leslie Vensel located?
- Leslie Vensel's practice location on file with NPPES is 40 2nd Ave, Waltham, MA 02451-1132.
- What is Leslie Vensel's phone number?
- The practice phone number listed in the NPPES registry for Leslie Vensel is (781) 487-4350.
- Does Leslie Vensel accept Medicare?
- Leslie Vensel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leslie Vensel's NPI active?
- Yes — Leslie Vensel's NPI (1336139021) is active in the NPPES registry as of the last update on 2014-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.