Quick answers
- Does Janine M. Kerkstra accept Medicare assignment?
- Yes. Medicare's clinician data says Janine M. Kerkstra 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 Janine M. Kerkstra see?
- In 2024, CMS data shows 67 Original Medicare patients and 220 services for Janine M. Kerkstra. This counts Original Medicare only and measures volume, not quality.
- What is Janine M. Kerkstra's NPI number?
- 1851440424. 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 Janine M. Kerkstra, 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 | 67 |
|---|---|
| Services billed to Medicare | 220 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 62 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)165 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 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).
- Anxiety72%
- High cholesterol61%
- High blood pressure60%
- Depression60%
- Arthritis37%
- Diabetes28%
Hospitals where Janine M. Kerkstra works
Medicare's Facility Affiliation Data lists Janine M. Kerkstra 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.
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230038
- University of Michigan Health - WestWyoming, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230236
Practice locations
Addresses where Janine M. Kerkstra is enrolled with Medicare (CMS data updated October 2, 2026).
- 1877 Georgetown Ctr DrJenison, MI 49428 (616) 795‑0298
- 300 68th St SEGrand Rapids, MI 49548 (616) 455‑5000
- 300 68th St SE, Attn Diane FennemaGrand Rapids, MI 49548
- 300 SE 68th StGrand Rapids, MI 49548 (616) 455‑5000
- 503 Century Ln, Suite 2Holland, MI 49423 (616) 795‑0298
Group practices
Medicare enrollment lists Janine M. Kerkstra as a member of these groups (CMS data updated October 2, 2026).
- Pine Rest Christian Mental Health Services353 clinicians in the group
- Hope and Wholeness Psychology Center LLC19 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Other clinicians in Pine Rest Christian Mental Health Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2005 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1851440424 |
| 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
- 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