Quick answers
- Which hospitals does Brian J. Tjarks work at?
- Medicare's official clinician data lists Brian J. Tjarks at 5 hospitals: Avera Marshall Regional Medical Ctr, Avera McKennan Hospital & University Health Center, Avera St Mary's Hospital, Lakes Regional Healthcare and Regional Health Services of Howard County. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian J. Tjarks see patients?
- Medicare's clinician data lists 1 practice location in Sioux Falls, SD. Call before your visit to confirm the address.
- What is Brian J. Tjarks's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Brian J. Tjarks accept Medicare assignment?
- Yes. Medicare's clinician data says Brian J. Tjarks 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 Brian J. Tjarks?
- (605) 322-7200, as listed in official Medicare / NPI Registry data.
- What is Brian J. Tjarks's NPI number?
- 1093133258. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian J. Tjarks works
Medicare's Facility Affiliation Data lists Brian J. Tjarks at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- 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 St Mary's HospitalPierre, SD · Acute Care Hospital · CCN 430015
- Lakes Regional HealthcareSpirit Lake, IA · Acute Care Hospital · CCN 160124
- Regional Health Services of Howard CountyCresco, IA · Critical Access Hospital · CCN 161328
Practice locations
Addresses where Brian J. Tjarks is enrolled with Medicare (CMS data updated 2026-10-02).
- 1301 S Cliff Ave, Suite 700Sioux Falls, SD 57105 (605) 322‑7200
Group practices
Medicare enrollment lists Brian J. Tjarks as a member of this group (CMS data updated 2026-10-02).
- Physicians Laboratory Ltd14 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Sioux Falls
Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Sanford School Of Medicine Of University Of South Dakota |
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1093133258 |
| 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