ZACHARY PETER HAMERSMA MD
NPI 1245725217
Emergency Medicine in Ludington, MI
About Zachary Peter Hamersma Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ZACHARY PETER HAMERSMA MD (NPI 1245725217) is an individual emergency medicine provider in Ludington, Michigan, licensed in Michigan (4301115550) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Michigan State University College Of Human Medicine (2018).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Zachary Peter Hamersma Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Zachary Hamersma reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 265 clinicians in this Medicare group
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 192 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MICorewell Health Ludington Hospital
Acute Care Hospitals · Ludington, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49431 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Zachary Hamersma's NPI number?
The NPI number for Zachary Hamersma is 1245725217. It was assigned to this individual provider in the NPPES registry on June 22, 2018.
Where is Zachary Hamersma located?
Zachary Hamersma practices at 1 Atkinson Dr, Ludington, MI 49431. The listed phone number is (231) 843-2591.
What is Zachary Hamersma's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Zachary Hamersma enrolled in Medicare?
Yes. Zachary Hamersma is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Zachary Hamersma's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Hamersma reassigns Medicare benefits to 2 organizations: Ecs Western Michigan PC (Grand Rapids, MI) and Visionary Medical Services PC (Grand Rapids, MI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Zachary Hamersma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Zachary Hamersma affiliated with any hospitals?
According to CMS data, Zachary Hamersma is affiliated with Spectrum Health and Corewell Health Ludington Hospital.
When was this NPI record last updated?
The NPPES record for Zachary Hamersma was last updated on January 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Zachary Peter Hamersma, MD · NPI 1245725217
Emergency Medicine physician in Ludington, Michigan. Individual provider, active in the CMS NPPES registry since June 22, 2018.
## Identity
- **NPI:** 1245725217 (Entity type: Individual)
- **Enumerated:** June 22, 2018
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4301115550 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 ATKINSON DR, Ludington, MI 49431-1906
- **Phone:** (231) 843-2591
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Ecs Western Michigan PC (NPI 1992281000, Grand Rapids, MI); Visionary Medical Services PC (NPI 1538216569, Grand Rapids, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Human Medicine, class of 2018
## Record status
- **NPPES last updated:** January 2, 2026
- **Other identifiers:** Medicaid 4301502785 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1245725217) · Data from the CMS NPPES public registry.