NATHAN FRITZ D.O.
NPI 1689014003
Emergency Medicine in Grand Rapids, MI
About Nathan Fritz D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHAN FRITZ D.O. (NPI 1689014003) is an individual emergency medicine provider in Grand Rapids, Michigan, licensed in Michigan (5101020632) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and maintains a secondary practice location in Mount Clemens.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Nathan Fritz D.o. 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
5Medicare enrollment records show Nathan Fritz reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49525
- Reassigned Medicare billing, Michigan enrollment
- 54 clinicians in this Medicare group
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
Waterford, MI 48328
- Reassigned Medicare billing, Michigan enrollment
- 90 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 3
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 Gerber Hospital
Critical Access Hospitals · Fremont, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49506 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 49506
GRAND RAPIDS, MI 49506
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 Nathan Fritz's NPI number?
The NPI number for Nathan Fritz is 1689014003. It was assigned to this individual provider in the NPPES registry on June 29, 2013.
Where is Nathan Fritz located?
Nathan Fritz practices at 1840 Wealthy St SE, Grand Rapids, MI 49506. The listed phone number is (616) 391-1730.
What is Nathan Fritz's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Nathan Fritz enrolled in Medicare?
Yes. Nathan Fritz 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 Nathan Fritz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Fritz reassigns Medicare benefits to 5 organizations: Rightcare Clinic PC (Grand Rapids, MI), Ecs Western Michigan PC (Grand Rapids, MI), Visionary Medical Services PC (Grand Rapids, MI), Elizabeth Lake Urgent Care PLLC (Waterford, 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 Nathan Fritz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Nathan Fritz affiliated with any hospitals?
According to CMS data, Nathan Fritz is affiliated with Spectrum Health and Corewell Health Gerber Hospital.
When was this NPI record last updated?
The NPPES record for Nathan Fritz 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.
# Nathan Fritz, D.O. · NPI 1689014003
Emergency Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since June 29, 2013.
## Identity
- **NPI:** 1689014003 (Entity type: Individual)
- **Enumerated:** June 29, 2013
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 5101020632 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1840 WEALTHY ST SE, Grand Rapids, MI 49506-2921
- **Phone:** (616) 391-1730
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Rightcare Clinic PC (NPI 1972372142, Grand Rapids, MI); Ecs Western Michigan PC (NPI 1992281000, Grand Rapids, MI); Visionary Medical Services PC (NPI 1538216569, Grand Rapids, MI); Elizabeth Lake Urgent Care PLLC (NPI 1538585260, Waterford, MI); Ecs Northern Michigan PC (NPI 1992231377, Petoskey, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2013
## Record status
- **NPPES last updated:** February 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1689014003) · Data from the CMS NPPES public registry.