Quick answers
- Which hospitals does Nick Onyemeke work at?
- Medicare's official clinician data lists Nick Onyemeke at 5 hospitals: Flambeau Hospital, Marshfield Medical Center, Marshfield Medical Center - Minocqua, WellSpan Ephrata Community Hospital and WellSpan York Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nick Onyemeke see patients?
- Medicare's clinician data lists 2 practice locations, including Marshfield, WI and Minocqua, WI. Call before your visit to confirm the address.
- What is Nick Onyemeke's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Internal Medicine.
- Does Nick Onyemeke accept Medicare assignment?
- Yes. Medicare's clinician data says Nick Onyemeke accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Nick Onyemeke?
- (715) 387-5511, as listed in official Medicare / NPI Registry data.
- What is Nick Onyemeke's NPI number?
- 1730410549. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nick Onyemeke works
Medicare's Facility Affiliation Data lists Nick Onyemeke at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Flambeau HospitalPark Falls, WI · Critical Access Hospital · CCN 521325
- Marshfield Medical CenterMarshfield, WI · Acute Care Hospital · CCN 520037
- Marshfield Medical Center - MinocquaMinocqua, WI · Acute Care Hospital · CCN 520212
- WellSpan Ephrata Community HospitalEphrata, PA · Acute Care Hospital · CCN 390225
- WellSpan York HospitalYork, PA · Acute Care Hospital · CCN 390046
Practice locations
Addresses where Nick Onyemeke is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 9576 Hwy 70Minocqua, WI 54548 (715) 358‑1710
Group practices
Medicare enrollment lists Nick Onyemeke as a member of this group (CMS data updated 2026-10-02).
- MCHS Hospitals Inc1,197 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730410549 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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