Konstantinos Vlachonassios, M.D.
NPI 1851473003ActiveIndividual· Internal Medicine, Cardiovascular Disease· Lakewood, CA
Internal Medicine, Cardiovascular Disease (M.D.) in Lakewood, California, licensed in CA, with an NPI issued in October 2006. Their prescriptions cost Medicare Part D more than their services did: $2,753,745 for 7,757 claims, against $125,454 paid for services in 2024. Abiomed was the largest of 16 companies reporting payments in 2025, $2,022 in all, mostly food and beverage. Lists Pih Health Downey Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1851473003 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 19, 2006 |
| Last updated in NPPES | Dec 12, 2024 |
| Certified by provider | Dec 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A52738 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 399 |
|---|---|
| Services billed | 1,576 across 44 procedure codes |
| Paid by Medicare | $125,454 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,757 · 18,671 30-day fills |
|---|---|
| Patients | 547 |
| Total drug cost | $2,753,745 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Hospital affiliations
- Pih Health Downey HospitalDowney, CA
- Pih Health Hospital-WhittierWhittier, CA
- Uci Health-LakewoodLakewood, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$2,022 · 73 payments from 16 companies
- 2024$3,196 · 106 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $299.83 | 4 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $264.54 | 13 |
| Merck Sharp & Dohme LLC | $228.03 | 7 |
| Novartis Pharmaceuticals Corporation | $180.09 | 10 |
| Biotronik Inc. | $176.41 | 6 |
What the 2025 payments were for
- Food and Beverage$2,022 · 73 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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