Vassilis Jerry Siomos, M.D.
NPI 1598907149ActiveIndividual· Urology· Kalispell, MT
Urology (M.D.) in Kalispell, Montana, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2009). 365 Medicare patients in 2024, $96,795 paid; nearly all of their 840 Part D prescriptions were generic (93%). Janssen Biotech, Inc. reported $81.60 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1598907149 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 28, 2009 |
| Last updated in NPPES | Nov 27, 2023 |
| Certified by provider | Jun 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 41781 | MT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 365 |
|---|---|
| Services billed | 1,156 across 63 procedure codes |
| Paid by Medicare | $96,795 |
Part D prescriptions in 2024
| Prescriptions (claims) | 840 · 1,278 30-day fills |
|---|---|
| Patients | 211 |
| Total drug cost | $44,269 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Urology |
Medical group
- Kalispell Regional Medical Center IncKalispell, MT · 421 clinicians
Hospital affiliations
- Cabinet Peaks Medical CenterLibby, MT
- Clark Fork Valley HospitalPlains, MT
- Logan Health - WhitefishWhitefish, MT
- Logan Health Medical CenterKalispell, MT
Industry payments (Open Payments)
- 2025$81.60 · 1 payment from 1 company
- 2024$185.04 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $81.60 | 1 |
What the 2025 payments were for
- Food and Beverage$81.60 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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