KARRI MACMILLAN
NPI 1467865188
Family Medicine in Grand Rapids, MI
About Karri Macmillan NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KARRI MACMILLAN (NPI 1467865188) is an individual family medicine provider in Grand Rapids, Michigan, licensed in Michigan (5101022964) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, is affiliated with Mercy Health Saint Mary's, and is a graduate of Other (2014).
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 and accepts Medicare assignment
Karri Macmillan 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 Reassignment
Medicare enrollment records show Karri Macmillan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Grand Rapids, MI 49503
- Reassigned Medicare billing, Michigan enrollment
- 737 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Health Saint Mary's
Acute Care Hospitals · Grand Rapids, 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.
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 Karri Macmillan's NPI number?
The NPI number for Karri Macmillan is 1467865188. It was assigned to this individual provider in the NPPES registry on June 10, 2014.
Where is Karri Macmillan located?
Karri Macmillan practices at 300 Lafayette Ave SE Ste 4200, Grand Rapids, MI 49503. The listed phone number is (616) 685-6921.
What is Karri Macmillan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Karri Macmillan enrolled in Medicare?
Yes. Karri Macmillan 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 organization bills Medicare for Karri Macmillan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karri Macmillan reassigns Medicare benefits to Advantage Health Saint Mary's Medical Group (Grand Rapids, MI). 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 Karri Macmillan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karri Macmillan accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Karri Macmillan 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 Karri Macmillan affiliated with any hospitals?
According to CMS data, Karri Macmillan is affiliated with Mercy Health Saint Mary's.
When was this NPI record last updated?
The NPPES record for Karri Macmillan was last updated on September 19, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Karri Macmillan · NPI 1467865188
Family Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since June 10, 2014.
## Identity
- **NPI:** 1467865188 (Entity type: Individual)
- **Enumerated:** June 10, 2014
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 5101022964 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LAFAYETTE AVE SE STE 4200, Grand Rapids, MI 49503-4692
- **Phone:** (616) 685-6921 · **Fax:** (616) 685-5105
## 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:** Advantage Health Saint Mary's Medical Group (NPI 1952340911, Grand Rapids, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** September 19, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1467865188) · Data from the CMS NPPES public registry.