WILLIAM MILLS
NPI 1104377878
Counselor - Mental Health in Minneapolis, MN
About William Mills NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM MILLS (NPI 1104377878) is an individual mental health provider in Minneapolis, Minnesota, licensed in Minnesota (2826) and active in the NPI registry since October 2016. He is enrolled in Medicare PECOS and is a graduate of Other (2010).
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
William Mills 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 William Mills reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
North Saint Paul, MN 55109
- Reassigned Medicare billing, Minnesota enrollment
- 42 clinicians in this Medicare group
San Francisco, CA 94131
- Reassigned Medicare billing, Minnesota enrollment
- Medicare enrollment name: Brightside Medical PA
- 11 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.
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 Mills's NPI number?
The NPI number for William Mills is 1104377878. It was assigned to this individual provider in the NPPES registry on October 18, 2016.
Where is William Mills located?
William Mills practices at 1804 10th Ave S, Minneapolis, MN 55404. The listed phone number is (612) 747-9561.
What is William Mills's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is William Mills enrolled in Medicare?
Yes. William 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 William Mills's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Mills reassigns Medicare benefits to 2 organizations: Bhsi, LLC (North Saint Paul, MN) and Brightside Medical, P.A. (San Francisco, CA). 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 William Mills's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Mills accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of North Dakota, HealthPartners and UnitedHealthcare list William Mills 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 Mills was last updated on October 18, 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 Mills · NPI 1104377878
Mental Health provider in Minneapolis, Minnesota. Individual provider, active in the CMS NPPES registry since October 18, 2016.
## Identity
- **NPI:** 1104377878 (Entity type: Individual)
- **Enumerated:** October 18, 2016
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 2826 (Minnesota)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1804 10TH AVE S, Minneapolis, MN 55404-2001
- **Phone:** (612) 747-9561
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Bhsi, LLC (NPI 1174635643, North Saint Paul, MN); Brightside Medical, P.A. (NPI 1609335660, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** October 18, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1104377878) · Data from the CMS NPPES public registry.