Quick answers
- Does Erika L. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Erika L. 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.
- How many Medicare patients does Erika L. O'Brien see?
- In 2024, CMS data shows 29 Original Medicare patients and 50 services for Erika L. O'Brien. This counts Original Medicare only and measures volume, not quality.
- What is Erika L. O'Brien's NPI number?
- 1255904322. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Erika L. O'Brien, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 29 |
|---|---|
| Services billed to Medicare | 50 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Critical care, first 30-74 minutes (99291)17 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- COPD66%
- Atrial fibrillation66%
- Ischemic heart disease62%
- Diabetes59%
Hospitals where Erika L. O'Brien works
Medicare's Facility Affiliation Data lists Erika L. 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.
- Trinity MuscatineMuscatine, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160013
- Trinity Rock IslandRock Island, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140280
Practice locations
Addresses where Erika L. O'Brien is enrolled with Medicare (CMS data updated October 2, 2026).
- 2560 24th St, Suite 102Rock Island, IL 61201 (309) 779‑3670
- 4480 Utica Ridge Rd, Suite 160Bettendorf, IA 52722 (563) 742‑5950
Group practices
Medicare enrollment lists Erika L. O'Brien as a member of this group (CMS data updated October 2, 2026).
- Trinity Medical Center99 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Rock Island
Clinicians with the same Medicare primary specialty in Rock Island, IL — not a recommendation.
Other clinicians in Trinity Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255904322 |
| 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
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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