Quick answers
- Which hospitals does Lauren A. O'Brien work at?
- Medicare's official clinician data lists Lauren A. O'Brien at 1 hospital: Sanford Usd Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lauren A. O'Brien see patients?
- Medicare's clinician data lists 4 practice locations, including Sioux Falls, SD. Call before your visit to confirm the address.
- What is Lauren A. O'Brien's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Lauren A. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Lauren A. O'Brien 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 Lauren A. O'Brien?
- (605) 312-2200, as listed in official Medicare / NPI Registry data.
- What is Lauren A. O'Brien's NPI number?
- 1447513379. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lauren A. O'Brien works
Medicare's Facility Affiliation Data lists Lauren A. O'Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sanford Usd Medical CenterSioux Falls, SD · Acute Care Hospital · CCN 430027
Practice locations
Addresses where Lauren A. O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 1301 W 18th StSioux Falls, SD 57105 (605) 312‑2200
- 1305 W 18th StSioux Falls, SD 57105
- 1500 W 22nd StSioux Falls, SD 57105
- 4405 E 26th StSioux Falls, SD 57103
Group practices
Medicare enrollment lists Lauren A. O'Brien as a member of these groups (CMS data updated 2026-10-02).
- Sanford Medical Center857 clinicians in the group
- Sanford Clinic268 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Sioux Falls
Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447513379 |
| 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