Quick answers
- Which hospitals does John Halloran work at?
- Medicare's official clinician data lists John Halloran at 5 hospitals: Cox Medical Centers, King's Daughters' Medical Center, Mercy Hospital Oklahoma City, Inc, Saint Lukes North Hospital and West Jersey Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Halloran see patients?
- Medicare's clinician data lists 3 practice locations, including Urbandale, IA, Cedar Falls, IA and Mason City, IA. Call before your visit to confirm the address.
- What is John Halloran's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty, and also Interventional Radiology.
- Does John Halloran accept Medicare assignment?
- Yes. Medicare's clinician data says John Halloran 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 John Halloran?
- (515) 221-2339, as listed in official Medicare / NPI Registry data.
- What is John Halloran's NPI number?
- 1821044587. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Halloran works
Medicare's Facility Affiliation Data lists John Halloran at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cox Medical CentersSpringfield, MO · Acute Care Hospital · CCN 260040
- King's Daughters' Medical CenterAshland, KY · Acute Care Hospital · CCN 180009
- Mercy Hospital Oklahoma City, IncOklahoma City, OK · Acute Care Hospital · CCN 370013
- Saint Lukes North HospitalKansas City, MO · Acute Care Hospital · CCN 260062
- West Jersey HospitalVoorhees, NJ · Acute Care Hospital · CCN 310022
Practice locations
Addresses where John Halloran is enrolled with Medicare (CMS data updated 2026-10-02).
- 14235 Ridgemont DrUrbandale, IA 50323 (515) 221‑2339
- 2415 N Union RdCedar Falls, IA 50613 (952) 595‑1100
- 406 River Bend DrMason City, IA 50401 (281) 742‑0469
Group practices
Medicare enrollment lists John Halloran as a member of these groups (CMS data updated 2026-10-02).
- Singleton Associates PA838 clinicians in the group
- Virtual Radiologic Professionals LLC397 clinicians in the group
- South Jersey Radiology Associates P A206 clinicians in the group
- Englewood Radiologic Group P A132 clinicians in the group
- Fred Smeltzer MD and Associates Inc94 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
- Interventional Radiologyalso
Other radiologists in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821044587 |
| 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