Quick answers
- Which hospitals does Benjamin C. Aaker work at?
- Medicare's official clinician data lists Benjamin C. Aaker at 4 hospitals: Avera McKennan Hospital & University Health Center, Avera Queen of Peace, Avera Sacred Heart Hospital and Prairie Lakes Healthcare System, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Benjamin C. Aaker see patients?
- Medicare's clinician data lists 1 practice location in Watertown, SD. Call before your visit to confirm the address.
- What is Benjamin C. Aaker's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Benjamin C. Aaker accept Medicare assignment?
- Yes. Medicare's clinician data says Benjamin C. Aaker 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 Benjamin C. Aaker?
- (605) 882-7000, as listed in official Medicare / NPI Registry data.
- What is Benjamin C. Aaker's NPI number?
- 1811198278. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Benjamin C. Aaker works
Medicare's Facility Affiliation Data lists Benjamin C. Aaker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Avera McKennan Hospital & University Health CenterSioux Falls, SD · Acute Care Hospital · CCN 430016
- Avera Queen of PeaceMitchell, SD · Critical Access Hospital · CCN 431340
- Avera Sacred Heart HospitalYankton, SD · Acute Care Hospital · CCN 430012
- Prairie Lakes Healthcare System, IncWatertown, SD · Acute Care Hospital · CCN 430005
Practice locations
Addresses where Benjamin C. Aaker is enrolled with Medicare (CMS data updated 2026-10-02).
- 401 9th Ave NWWatertown, SD 57201 (605) 882‑7000
Group practices
Medicare enrollment lists Benjamin C. Aaker as a member of this group (CMS data updated 2026-10-02).
- Prairie Lakes Health Care System Inc109 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Watertown
Clinicians with the same Medicare primary specialty in Watertown, SD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Nebraska College Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811198278 |
| 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