Nikolaos J. Tsiouris, M.D.
NPI 1790789428ActiveIndividual· Internal Medicine, Cardiovascular Disease· Las Vegas, NV
Internal Medicine, Cardiovascular Disease (M.D.) with Heart Center of Nevada, practicing in Las Vegas, Nevada. Their prescriptions cost Medicare Part D more than their services did: $539,819 for 1,702 claims, against $249,688 paid for services in 2024. Biotronik Inc. was the largest of 8 companies reporting payments in 2025, $10,992 in all, mostly consulting fees. Lists Mountainview Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1790789428 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 10, 2005 |
| Last updated in NPPES | Aug 30, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 11945 | NV |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 20030188 | NV |
| Internal Medicine, Clinical Cardiac Electrophysiology | 207RC0001X | 20030188 | NV |
| Internal Medicine, Clinical Cardiac Electrophysiology | 207RC0001X | 11945 | NV |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiovascular Disease (Cardiology) (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,031 |
|---|---|
| Services billed | 3,188 across 57 procedure codes |
| Paid by Medicare | $249,688 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,702 · 3,644 30-day fills |
|---|---|
| Patients | 268 |
| Total drug cost | $539,819 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Heart Center of NevadaLas Vegas, NV · 17 clinicians
Hospital affiliations
- Mountainview HospitalLas Vegas, NV
- Southern Hills Hospital and Medical CenterLas Vegas, NV
- Spring Valley Hospital Medical CenterLas Vegas, NV
- Sunrise Hospital and Medical CenterLas Vegas, NV
- Valley Hospital Medical CenterLas Vegas, NV
Industry payments (Open Payments)
- 2025$10,992 · 33 payments from 8 companies
- 2024$2,477 · 31 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotronik Inc. | $8,416 | 14 |
| Abbott Laboratories | $2,382 | 11 |
| Cvrx, Inc. | $50.21 | 2 |
| E.R. Squibb & Sons, L.L.C. | $48.75 | 2 |
| Pfizer Inc. | $28.49 | 1 |
What the 2025 payments were for
- Consulting Fee$6,300 · 4 payments
- Compensation for serving as faculty or as a speaker for a medical education program$2,400 · 2 payments
- Travel and Lodging$1,712 · 11 payments
- Food and Beverage$580.39 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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