Quick answers
- Does Elizabeth A. Diemer accept Medicare assignment?
- Yes. Medicare's clinician data says Elizabeth A. Diemer 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 Elizabeth A. Diemer's NPI number?
- 1699539577. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Elizabeth A. Diemer works
Medicare's Facility Affiliation Data lists Elizabeth A. Diemer 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.
- OSF Saint Elizabeth MDL CenterPeru, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140110
- Saint James HospitalPontiac, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 140161
- St Joseph Medical CenterBloomington, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140162
Practice locations
Addresses where Elizabeth A. Diemer is enrolled with Medicare (CMS data updated October 2, 2026).
- 2500 W Reynolds St, 207 OSF Healthcare Medical Group PontiacPontiac, IL 61764 (815) 844‑2001
Group practices
Medicare enrollment lists Elizabeth A. Diemer as a member of this group (CMS data updated October 2, 2026).
- Saint James Hospital74 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Pontiac
Clinicians with the same Medicare primary specialty in Pontiac, IL — not a recommendation.
Other clinicians in Saint James Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2023 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699539577 |
| 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