Quick answers
- Does Mary F. O'Connor accept Medicare assignment?
- Yes. Medicare's clinician data says Mary F. O'Connor 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 Mary F. O'Connor's NPI number?
- 1255303756. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary F. O'Connor works
Medicare's Facility Affiliation Data lists Mary F. O'Connor 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.
- Hansen Family HospitalIowa Falls, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161380
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160030
- Story County HospitalNevada, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161333
- UnityPoint Health - MarshalltownMarshalltown, IA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 160001
Practice locations
Addresses where Mary F. O'Connor is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 10th AveAckley, IA 50601 (641) 648‑7107
Group practices
Medicare enrollment lists Mary F. O'Connor as a member of this group (CMS data updated October 2, 2026).
- Ellsworth Municipal Hospital15 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Iowa
Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.
Other clinicians in Ellsworth Municipal Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1997 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255303756 |
| 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