Quick answers
- Which hospitals does Ari P. Ballonoff work at?
- Medicare's official clinician data lists Ari P. Ballonoff at 3 hospitals: Hca-Healthone dba Swedish Medical Center, National Jewish Health and Saint Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ari P. Ballonoff see patients?
- Medicare's clinician data lists 2 practice locations, including Denver, CO and Firestone, CO. Call before your visit to confirm the address.
- What is Ari P. Ballonoff's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Ari P. Ballonoff accept Medicare assignment?
- Yes. Medicare's clinician data says Ari P. Ballonoff accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Ari P. Ballonoff?
- (303) 338-4545, as listed in official Medicare / NPI Registry data.
- What is Ari P. Ballonoff's NPI number?
- 1689720260. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ari P. Ballonoff works
Medicare's Facility Affiliation Data lists Ari P. Ballonoff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hca-Healthone dba Swedish Medical CenterEnglewood, CO · Acute Care Hospital · CCN 060034
- National Jewish HealthDenver, CO · Acute Care Hospital · CCN 060107
- Saint Joseph HospitalDenver, CO · Acute Care Hospital · CCN 060028
Practice locations
Addresses where Ari P. Ballonoff is enrolled with Medicare (CMS data updated 2026-10-02).
- 1375 E 19th Ave, Kp Intermountain Health St. Joseph HospitalDenver, CO 80218 (303) 338‑4545
- 8350 Colorado Blvd, Unit 160Firestone, CO 80504
Group practices
Medicare enrollment lists Ari P. Ballonoff as a member of these groups (CMS data updated 2026-10-02).
- Colorado Permanente Medical Group PC1,327 clinicians in the group
- Intermountain Medical Group Denver LLC568 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Denver
Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689720260 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians