Quick answers
- Does Mollie R. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Mollie R. O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Mollie R. O'Brien's NPI number?
- 1255958427. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mollie R. O'Brien works
Medicare's Facility Affiliation Data lists Mollie R. O'Brien at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Boone County HospitalBoone, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161372
Practice locations
Addresses where Mollie R. O'Brien is enrolled with Medicare (CMS data updated October 2, 2026).
- 5950 University Ave, Suite 105West Des Moines, IA 50266 (515) 875‑9100
- 813 N Lincoln St, Suite 15Knoxville, IA 50138 (641) 842‑2717
Group practices
Medicare enrollment lists Mollie R. O'Brien as a member of these groups (CMS data updated October 2, 2026).
- The Iowa Clinic PC310 clinicians in the group
- United Community Services Inc13 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in West Des Moines
Clinicians with the same Medicare primary specialty in West Des Moines, IA — not a recommendation.
Other clinicians in The Iowa Clinic PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255958427 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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