WILLIAM MI
NPI 1861948895
Family Medicine in Grand Rapids, MI
About William Mi NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM MI (NPI 1861948895) is an individual family medicine provider in Grand Rapids, Michigan, licensed in Michigan (4301110694) and active in the NPI registry since August 2016. He is enrolled in Medicare PECOS and is a graduate of Other (2026).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William Mi is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show William Mi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
West Monroe, LA 71292
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 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.
Physician 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.
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
GRAND RAPIDS, MI 49503
GRAND RAPIDS, MI 49503
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 William Mi's NPI number?
The NPI number for William Mi is 1861948895. It was assigned to this individual provider in the NPPES registry on August 30, 2016.
Where is William Mi located?
William Mi practices at 25 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 267-0800.
What is William Mi's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is William Mi enrolled in Medicare?
Yes. William Mi is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for William Mi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Mi reassigns Medicare benefits to Ochsner Clinic LLC (West Monroe, LA). The 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 William Mi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Mi accept?
Health plans from Cigna Healthcare and HMO Louisiana list William Mi 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.
When was this NPI record last updated?
The NPPES record for William Mi was last updated on August 30, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.
# William Mi · NPI 1861948895
Family Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since August 30, 2016.
## Identity
- **NPI:** 1861948895 (Entity type: Individual)
- **Enumerated:** August 30, 2016
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 4301110694 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 25 MICHIGAN ST NE, Grand Rapids, MI 49503-2515
- **Phone:** (616) 267-0800
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Ochsner Clinic LLC (NPI 1932598695, West Monroe, LA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2026
## Record status
- **NPPES last updated:** August 30, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1861948895) · Data from the CMS NPPES public registry.