Quick answers
- Where does Ellen E. Hopper see patients?
- Medicare's clinician data lists 3 practice locations, including Watertown, SD and Sioux Falls, SD. Call before your visit to confirm the address.
- What is Ellen E. Hopper's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Ellen E. Hopper accept Medicare assignment?
- Yes. Medicare's clinician data says Ellen E. Hopper 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 Ellen E. Hopper?
- (605) 886-9317, as listed in official Medicare / NPI Registry data.
- What is Ellen E. Hopper's NPI number?
- 1487850913. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ellen E. Hopper is enrolled with Medicare (CMS data updated 2026-10-02).
- 401 9th Ave NWWatertown, SD 57201 (605) 886‑9317
- 4405 E 26th StSioux Falls, SD 57103
- 901 4th St NWWatertown, SD 57201 (605) 886‑8471
Group practices
Medicare enrollment lists Ellen E. Hopper as a member of this group (CMS data updated 2026-10-02).
- Sanford Medical Center857 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in South Dakota
Clinicians with the same Medicare primary specialty in South Dakota — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487850913 |
| 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
- 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