Quick answers
- Does Callan J. Oljace accept Medicare assignment?
- Yes. Medicare's clinician data says Callan J. Oljace 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 Callan J. Oljace's NPI number?
- 1811362767. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Callan J. Oljace works
Medicare's Facility Affiliation Data lists Callan J. Oljace 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.
- Corewell Health Pennock HospitalHastings, MI · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 231339
Practice locations
Addresses where Callan J. Oljace is enrolled with Medicare (CMS data updated October 2, 2026).
- 1375 W Green St, Suite 1Hastings, MI 49058 (269) 945‑7497
Group practices
Medicare enrollment lists Callan J. Oljace as a member of this group (CMS data updated October 2, 2026).
- Family Tree Medical Associates PC3 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Hastings
Clinicians with the same Medicare primary specialty in Hastings, MI — not a recommendation.
Other clinicians in Family Tree Medical Associates PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | Michigan State University College Of Human Medicine |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811362767 |
| 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