Leonid G. Karpenos, M.D.
Specialist · Westport, CT
Leonid G. Karpenos, M.D. is a specialist with a practice address in Westport, Connecticut, and NPI 1336267350, issued on Mar 27, 2007. Check the license (Connecticut 035041, as entered in NPPES) with the Connecticut board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Leonid G. Karpenos
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- 035041 CT
Self-reported in NPPES; status is on the state search - Practice location
- 32 Imperial Ave, Westport, CT 06880
- Phone
- (203) 226-1760
- Enumerated
- Mar 27, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (203) 221-8291
- Medicare enrollment
- Enrolled (PECOS I20051115000312); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 397 in Connecticut → Look up another NPI →
Also registered at 32 Imperial Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Leonid G. Karpenos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Connecticut board licenses this profession
Search for license 035041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average specialist in 2024
4,280 Medicare Part D claims for 406 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Rosuvastatin Calcium754 claims
- Eliquis286 claims
- Atorvastatin Calcium256 claims
- Ezetimibe256 claims
- Metoprolol Succinate207 claims
- Bisoprolol Fumarate187 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.
The MIPS final score for 2023 (Medicare payment program): 20.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $125.00
1 payment: food and beverage; the largest payer was Abbvie Inc. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Westport Cardiology,llcWestport, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Leonid G. Karpenos among 397 specialist records in Connecticut
Leonid G. Karpenos, M.D. is one of 397 specialist records with a practice address in Connecticut. 25% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 43% newer
- In a Medicare fileYes · 25% of these records are
- In the CMS Doctors and Clinicians fileYes · 15% of these records are
- Graduated1990 · median 1990 among the 59 with a school on file
- Record last updated2007 · 81% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in Connecticut
There are 397 specialist records in Connecticut.
All 397 in Connecticut → Every provider in Westport → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Karen Abrams, M.D.Westport, CT 068801174728604
- John Burke, PH.D.Westport, CT 068801568607257
- Margaret Galiani, MDWestport, CT 068801720084478
- Boris Goldman, M.D.Westport, CT 068801104821560
- Robert Israely, M.D.Westport, CT 068801245454115
- Shannon Reynolds, LMTWestport, CT 068801235508490
- Joshua Watson, LMFTWestport, CT 068801679860985
- Jill Wiener, MDWestport, CT 068801821192485
Common questions
What is Leonid G. Karpenos, M.D.'s NPI number?
Leonid G. Karpenos, M.D.'s National Provider Identifier (NPI) is 1336267350, issued on Mar 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leonid G. Karpenos, M.D. located?
The NPPES record lists a practice address at 32 Imperial Ave, Westport, CT, 06880. Phone: (203) 226-1760. Providers update this record themselves, so call before visiting.
How can I verify Leonid G. Karpenos, M.D.'s license?
NPPES lists Connecticut license number 035041, as entered by the provider. Search the Connecticut board that licenses this profession; the NPPES record confirms identity only.
How much does Leonid G. Karpenos, M.D. prescribe under Medicare Part D?
In 2024, Leonid G. Karpenos, M.D. had 4,280 Medicare Part D claims for 406 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Leonid G. Karpenos, M.D.'s MIPS final score?
The 2023 MIPS final score is 20.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.