Quick answers
- Which hospitals does Hillary A. Peirce work at?
- Medicare's official clinician data lists Hillary A. Peirce at 2 hospitals: Avera St Mary's Hospital and Prairie Lakes Healthcare System, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hillary A. Peirce see patients?
- Medicare's clinician data lists 2 practice locations, including Watertown, SD and Pierre, SD. Call before your visit to confirm the address.
- What is Hillary A. Peirce's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Hillary A. Peirce accept Medicare assignment?
- Yes. Medicare's clinician data says Hillary A. Peirce 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 Hillary A. Peirce?
- (605) 882-7000, as listed in official Medicare / NPI Registry data.
- What is Hillary A. Peirce's NPI number?
- 1205254166. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hillary A. Peirce works
Medicare's Facility Affiliation Data lists Hillary A. Peirce at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Avera St Mary's HospitalPierre, SD · Acute Care Hospital · CCN 430015
- Prairie Lakes Healthcare System, IncWatertown, SD · Acute Care Hospital · CCN 430005
Practice locations
Addresses where Hillary A. Peirce is enrolled with Medicare (CMS data updated 2026-10-02).
- 401 9th Ave NWWatertown, SD 57201 (605) 882‑7000
- 801 E Sioux AvePierre, SD 57501 (605) 224‑5901
Group practices
Medicare enrollment lists Hillary A. Peirce as a member of these groups (CMS data updated 2026-10-02).
- Prairie Lakes Health Care System Inc109 clinicians in the group
- Avera St Marys97 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Watertown
Clinicians with the same Medicare primary specialty in Watertown, SD — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1205254166 |
| 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