Quick answers
- Does Mikaela R. Koivisto accept Medicare assignment?
- Yes. Medicare's clinician data says Mikaela R. Koivisto 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 Mikaela R. Koivisto's NPI number?
- 1336991538. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mikaela R. Koivisto works
Medicare's Facility Affiliation Data lists Mikaela R. Koivisto 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.
- Grady Memorial HospitalChickasha, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370054
- Great Plains Regional Medical CenterElk City, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370019
- INTEGRIS Southwest Medical CenterOklahoma City, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370106
- McAlester Regional Health CenterMcAlester, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370034
- Purcell Municipal HospitalPurcell, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370158
Practice locations
Addresses where Mikaela R. Koivisto is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 E Clark Bass BlvdMcAlester, OK 74501 (405) 843‑5855
- 1500 N Green AvePurcell, OK 73080 (405) 527‑6524
- 2220 W Iowa Ave, Professional Medical ServicesChickasha, OK 73018 (405) 224‑2300
Group practices
Medicare enrollment lists Mikaela R. Koivisto as a member of these groups (CMS data updated October 2, 2026).
- Emergency Physicians of Mid-America PC82 clinicians in the group
- Grady Memorial Hospital47 clinicians in the group
- Premier Physician Staffing 2 PLLC16 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in McAlester
Clinicians with the same Medicare primary specialty in McAlester, OK — not a recommendation.
Other clinicians in Emergency Physicians of Mid-America PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of Arkansas College Of Medicine |
| Graduation year | 2024 (2 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336991538 |
| 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