Quick answers
- Which hospitals does Christopher Gregory work at?
- Medicare's official clinician data lists Christopher Gregory at 5 hospitals: Avera Heart Hospital of South Dakota, Avera Marshall Regional Medical Ctr, Avera McKennan Hospital & University Health Center, Avera Queen of Peace and Brookings Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Christopher Gregory see patients?
- Medicare's clinician data lists 12 practice locations, including Worthington, MN, Sioux Falls, SD and Marshall, MN. Call before your visit to confirm the address.
- What is Christopher Gregory's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Christopher Gregory accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher Gregory 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 Christopher Gregory?
- (507) 372-2921, as listed in official Medicare / NPI Registry data.
- What is Christopher Gregory's NPI number?
- 1821050212. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Christopher Gregory works
Medicare's Facility Affiliation Data lists Christopher Gregory at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Avera Heart Hospital of South DakotaSioux Falls, SD · Acute Care Hospital · CCN 430095
- Avera Marshall Regional Medical CtrMarshall, MN · Critical Access Hospital · CCN 241359
- Avera McKennan Hospital & University Health CenterSioux Falls, SD · Acute Care Hospital · CCN 430016
- Avera Queen of PeaceMitchell, SD · Critical Access Hospital · CCN 431340
- Brookings Health SystemBrookings, SD · Acute Care Hospital · CCN 430008
Practice locations
Addresses where Christopher Gregory is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 12; the Medicare profile lists all.
- 1216 Ryans RdWorthington, MN 56187 (507) 372‑2921
- 1216 Ryans Rd, Suite 1Worthington, MN 56187 (507) 372‑2921
- 1325 S Cliff AveSioux Falls, SD 57105 (605) 322‑4878
- 1325 S Cliff Ave, RadiologySioux Falls, SD 57105 (605) 322‑4878
- 201 W 69th StSioux Falls, SD 57108 (605) 336‑0635
Group practices
Medicare enrollment lists Christopher Gregory as a member of these groups (CMS data updated 2026-10-02).
- Avera McKennan959 clinicians in the group
- Avera Queen of Peace122 clinicians in the group
- Avera Marshall99 clinicians in the group
- Madison Community Hospital47 clinicians in the group
- Urology Specialists Chartered47 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Worthington
Clinicians with the same Medicare primary specialty in Worthington, MN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Johns Hopkins University School Of Medicine |
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821050212 |
| 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