Quick answers
- Where does Ellison J. Timmer see patients?
- Medicare's clinician data lists 2 practice locations, including Holland, MI and Grand Rapids, MI. Call before your visit to confirm the address.
- What is Ellison J. Timmer's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Ellison J. Timmer accept Medicare assignment?
- Yes. Medicare's clinician data says Ellison J. Timmer 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 Ellison J. Timmer?
- (616) 399-6500, as listed in official Medicare / NPI Registry data.
- What is Ellison J. Timmer's NPI number?
- 1982976304. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ellison J. Timmer is enrolled with Medicare (CMS data updated 2026-10-02).
- 12460 Riley StHolland, MI 49424 (616) 399‑6500
- 145 Michigan St NE, Suite 3100Grand Rapids, MI 49503 (616) 954‑9800
Group practices
Medicare enrollment lists Ellison J. Timmer as a member of this group (CMS data updated 2026-10-02).
- Cancer and Hematology Centers of Western Mi, P.C.110 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Holland
Clinicians with the same Medicare primary specialty in Holland, MI — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982976304 |
| 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
- 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