Ari P. Ballonoff, MD
NPI 1689720260ActiveIndividual· Radiology, Radiation Oncology· Denver, CO
Radiology, Radiation Oncology (MD) in Denver, Colorado, trained at University of Colorado School of Medicine, Denver (class of 2003). 42 Medicare patients in 2024, $44,555 paid; all of their 121 Part D prescriptions were generic. Novocure Inc. was the largest of 2 companies reporting payments in 2025, $33.04 in all, mostly food and beverage.
Overview
| NPI | 1689720260 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 26, 2007 |
| Last updated in NPPES | Jun 18, 2021 |
| Certified by provider | Jun 18, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 046364 | CO |
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 - Radiation Oncology (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 42 |
|---|---|
| Services billed | 414 across 26 procedure codes |
| Paid by Medicare | $44,555 |
Part D prescriptions in 2024
| Prescriptions (claims) | 121 · 185 30-day fills |
|---|---|
| Patients | 62 |
| Total drug cost | $2,448 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Radiation Oncology |
Medical groups
- Colorado Permanente Medical Group PCDenver, CO · 1,327 clinicians
- Intermountain Medical Group Denver LLCBroomfield, CO · 568 clinicians
Hospital affiliations
- Hca-Healthone DBA Swedish Medical CenterEnglewood, CO
- National Jewish HealthDenver, CO
- Saint Joseph HospitalDenver, CO
Industry payments (Open Payments)
- 2025$33.04 · 2 payments from 2 companies
- 2024$173.19 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novocure Inc. | $17.66 | 1 |
| Gt Medical Technologies, Inc | $15.38 | 1 |
What the 2025 payments were for
- Food and Beverage$33.04 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Radiology, Radiation Oncology providers in Denver
- 1275740508
- 1063322915
- 1518609452
- 1801576871
- 1700046166
- 1942609201
- 1780711366
- 1285834945
- 1043743883
- 1679740914
- 1811971542
- 1861619173