Quick answers
- Which hospitals does Martha Holstein work at?
- Medicare's official clinician data lists Martha Holstein at 2 hospitals: Avera Sacred Heart Hospital and St Michael's Hospital - CAH. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Martha Holstein see patients?
- Medicare's clinician data lists 1 practice location in Yankton, SD. Call before your visit to confirm the address.
- What is Martha Holstein's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Pediatric Medicine.
- Does Martha Holstein accept Medicare assignment?
- Yes. Medicare's clinician data says Martha Holstein 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 Martha Holstein?
- (605) 665-7841, as listed in official Medicare / NPI Registry data.
- What is Martha Holstein's NPI number?
- 1447601141. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Martha Holstein works
Medicare's Facility Affiliation Data lists Martha Holstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Avera Sacred Heart HospitalYankton, SD · Acute Care Hospital · CCN 430012
- St Michael's Hospital - CAHTyndall, SD · Critical Access Hospital · CCN 431327
Practice locations
Addresses where Martha Holstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 1104 W 8th StYankton, SD 57078 (605) 665‑7841
Group practices
Medicare enrollment lists Martha Holstein as a member of these groups (CMS data updated 2026-10-02).
- Sacred Heart Health Services153 clinicians in the group
- Yankton Medical Clinic PC59 clinicians in the group
Specialties
- Internal Medicineprimary
- Pediatric Medicinealso
Other internal medicine doctors in Yankton
Clinicians with the same Medicare primary specialty in Yankton, SD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Sanford School Of Medicine Of University Of South Dakota |
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447601141 |
| 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