Gregory Riccardo Vlacich, MD
NPI 1073839148ActiveIndividual· Radiology, Radiation Oncology· Saint Louis, MO
Radiology, Radiation Oncology (MD) with Washington University and 1 other group, practicing in Saint Louis, Missouri. 178 Medicare patients in 2024, $104,756 paid; nearly all of their 87 Part D prescriptions were generic (98%). Sumitomo Pharma America, Inc. was the largest of 4 companies reporting payments in 2025, $127.72 in all, mostly food and beverage. Lists Alton Memorial Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1073839148 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 14, 2010 |
| Last updated in NPPES | Apr 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 2016004564 | MO |
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 - Radiation Oncology (IL); Practitioner - Radiation Oncology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 178 |
|---|---|
| Services billed | 1,367 across 25 procedure codes |
| Paid by Medicare | $104,756 |
Part D prescriptions in 2024
| Prescriptions (claims) | 87 · 133 30-day fills |
|---|---|
| Patients | 35 |
| Total drug cost | $2,962 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Radiation Oncology |
Medical groups
- Washington UniversitySaint Louis, MO · 3,029 clinicians
- Washington University Physicians in Illinois IncSaint Louis, MO · 175 clinicians
Hospital affiliations
- Alton Memorial HospitalAlton, IL
- Barnes Jewish HospitalSaint Louis, MO
- Barnes-Jewish St Peters HospitalSaint Peters, MO
- Christian Hospital NortheastSaint Louis, MO
- Memorial HospitalBelleville, IL
Industry payments (Open Payments)
- 2025$127.72 · 5 payments from 4 companies
- 2024$53.47 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sumitomo Pharma America, Inc. | $48.73 | 2 |
| Astrazeneca Pharmaceuticals LP | $31.88 | 1 |
| Regeneron Healthcare Solutions, Inc. | $27.46 | 1 |
| Verity Pharmaceuticals Inc. | $19.65 | 1 |
What the 2025 payments were for
- Food and Beverage$127.72 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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