DR. CHARLES SIERZANT M.D.
NPI 1457765539
Emergency Medicine in Grand Rapids, MI
About Dr. Charles Sierzant M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CHARLES SIERZANT M.D. (NPI 1457765539) is an individual emergency medicine provider in Grand Rapids, Michigan, licensed in Michigan (4301105007) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Corewell Health Zeeland Hospital, and is a graduate of Michigan State University College Of Human Medicine (2014).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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
Dr. Charles Sierzant M.d. 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
4Medicare enrollment records show Charles Sierzant reassigns Medicare billing to 4 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
Grand Rapids, MI 49525
- Reassigned Medicare billing, Michigan enrollment
- 54 clinicians in this Medicare group
Petoskey, MI 49770
- Reassigned Medicare billing, Michigan enrollment
- 45 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 6
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Corewell Health Zeeland Hospital
Acute Care Hospitals · Zeeland, MISpectrum Health
Acute Care Hospitals · Grand Rapids, MICorewell Health Gerber Hospital
Critical Access Hospitals · Fremont, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49503 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.
GRAND RAPIDS, MI 49503
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 Charles Sierzant's NPI number?
The NPI number for Charles Sierzant is 1457765539. It was assigned to this individual provider in the NPPES registry on June 17, 2014.
Where is Charles Sierzant located?
Charles Sierzant practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 391-1680.
What is Charles Sierzant's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Charles Sierzant enrolled in Medicare?
Yes. Charles Sierzant 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 Charles Sierzant's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Charles Sierzant reassigns Medicare benefits to 4 organizations: Ecs Western Michigan PC (Grand Rapids, MI), Visionary Medical Services PC (Grand Rapids, MI), Rightcare Clinic PC (Grand Rapids, MI) and Ecs Northern Michigan PC (Petoskey, 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 Charles Sierzant's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Charles Sierzant accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan and Ambetter from Meridian list Charles Sierzant as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Charles Sierzant affiliated with any hospitals?
According to CMS data, Charles Sierzant is affiliated with Corewell Health Zeeland Hospital, Spectrum Health and Corewell Health Gerber Hospital.
When was this NPI record last updated?
The NPPES record for Charles Sierzant was last updated on February 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Dr. Charles Sierzant, M.D. · NPI 1457765539
Emergency Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since June 17, 2014.
## Identity
- **NPI:** 1457765539 (Entity type: Individual)
- **Enumerated:** June 17, 2014
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4301105007 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 MICHIGAN ST NE, Grand Rapids, MI 49503-2560
- **Phone:** (616) 391-1680
## 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:** 4 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); Rightcare Clinic PC (NPI 1972372142, Grand Rapids, MI); Ecs Northern Michigan PC (NPI 1992231377, Petoskey, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Human Medicine, class of 2014
## Record status
- **NPPES last updated:** February 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1457765539) · Data from the CMS NPPES public registry.