Quick answers
- Does Guerline Sinsmyr accept Medicare assignment?
- Yes. Medicare's clinician data says Guerline Sinsmyr 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 Guerline Sinsmyr's NPI number?
- 1255715462. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Guerline Sinsmyr works
Medicare's Facility Affiliation Data lists Guerline Sinsmyr 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.
- Dallas County HospitalPerry, IA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 161322
- Greater Regional Medical CenterCreston, IA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 161365
Practice locations
Addresses where Guerline Sinsmyr is enrolled with Medicare (CMS data updated October 2, 2026).
- 2002 Cedar StMuscatine, IA 52761 (563) 264‑2023
- 2625 Iowa StPerry, IA 50220 (515) 465‑5349
Group practices
Medicare enrollment lists Guerline Sinsmyr as a member of this group (CMS data updated October 2, 2026).
- Theoria Medical284 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Muscatine
Clinicians with the same Medicare primary specialty in Muscatine, IA — not a recommendation.
Other clinicians in Theoria Medical
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255715462 |
| 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