Quick answers
- Does Glenes J. Hamersma accept Medicare assignment?
- Yes. Medicare's clinician data says Glenes J. Hamersma 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.
- How many Medicare patients does Glenes J. Hamersma see?
- In 2024, CMS data shows 22 Original Medicare patients and 55 services for Glenes J. Hamersma. This counts Original Medicare only and measures volume, not quality.
- What is Glenes J. Hamersma's NPI number?
- 1841242898. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Glenes J. Hamersma, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 22 |
|---|---|
| Services billed to Medicare | 55 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 89 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)40 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- Alzheimer's disease or dementia75%
- Arthritis64%
- Anxiety64%
- High cholesterol55%
- Depression55%
Practice locations
Addresses where Glenes J. Hamersma is enrolled with Medicare (CMS data updated October 2, 2026).
- 200 Jefferson Ave SEGrand Rapids, MI 49503 (616) 685‑1835
Group practices
Medicare enrollment lists Glenes J. Hamersma as a member of this group (CMS data updated October 2, 2026).
- Saint Mary's Health Services173 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Other clinicians in Saint Mary's Health Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841242898 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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