DARIAN MILLS MD
NPI 1831884964
Emergency Medicine in Grand Rapids, MI
About Darian Mills Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DARIAN MILLS MD (NPI 1831884964) is an individual emergency medicine provider in Grand Rapids, Michigan, licensed in Michigan (4351051196) and active in the NPI registry since April 2023. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health United Hospital, and is a graduate of Michigan State University College Of Human Medicine (2023).
NPPES Registry Identity
Specialties & Licenses
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
Darian Mills 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 Darian Mills 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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health United Hospital
Acute Care Hospitals · Greenville, MISpectrum Health
Acute Care Hospitals · Grand Rapids, MICorewell Health Big Rapids Hospital
Acute Care Hospitals · Big Rapids, MICorewell Health Pennock Hospital
Critical Access Hospitals · Hastings, 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.
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 Darian Mills's NPI number?
The NPI number for Darian Mills is 1831884964. It was assigned to this individual provider in the NPPES registry on April 5, 2023.
Where is Darian Mills located?
Darian Mills practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 391-1680.
What is Darian Mills's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Darian Mills enrolled in Medicare?
Yes. Darian Mills 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 Darian Mills's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Darian Mills 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 Darian Mills's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Darian Mills affiliated with any hospitals?
According to CMS data, Darian Mills is affiliated with Spectrum Health United Hospital, Spectrum Health, Corewell Health Big Rapids Hospital and Corewell Health Pennock Hospital.
When was this NPI record last updated?
The NPPES record for Darian Mills was last updated on June 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Darian Mills, MD · NPI 1831884964
Emergency Medicine physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since April 5, 2023.
## Identity
- **NPI:** 1831884964 (Entity type: Individual)
- **Enumerated:** April 5, 2023
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4351051196 (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:** 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 2023
## Record status
- **NPPES last updated:** June 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1831884964) · Data from the CMS NPPES public registry.