Leonid Karpenos, M.D.
NPI 1336267350 · Specialist · Westport, CT
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonid Karpenos, M.D. is a Specialist provider in Westport, CT (NPI 1336267350).
Provider details
- NPI number
- 1336267350
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 035041 (CT)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,058 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician93040 | 531 | $13 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 506 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 437 | $127 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 236 | $90 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 103 | $197 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 754 | 209 |
| Apixabanbrand: Eliquis | 286 | 69 |
| Atorvastatin Calcium | 256 | 72 |
| Ezetimibe | 256 | 88 |
| Metoprolol Succinate | 207 | 64 |
| Bisoprolol Fumarate | 187 | 55 |
| Losartan Potassium | 139 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Leonid Karpenos's NPI number?
- Leonid Karpenos's National Provider Identifier (NPI) is 1336267350, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonid Karpenos's specialty?
- Leonid Karpenos is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Leonid Karpenos located?
- Leonid Karpenos's practice location on file with NPPES is 32 Imperial Ave, Westport, CT 06880-4328.
- What is Leonid Karpenos's phone number?
- The practice phone number listed in the NPPES registry for Leonid Karpenos is (203) 226-1760.
- Does Leonid Karpenos accept Medicare?
- Leonid Karpenos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonid Karpenos's NPI active?
- Yes — Leonid Karpenos's NPI (1336267350) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.