COLUMBIA ST. MARY'S HOSPITAL MILWAUKEE, INC
NPI 1710928221
Clinic/Center - Multi-Specialty in Mequon, WI
About Columbia St. Mary's Hospital Milwaukee, Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COLUMBIA ST. MARY'S HOSPITAL MILWAUKEE, INC (NPI 1710928221), doing business as Ascension Columbia St Mary's Hospital Milwaukee, is a healthcare organization registered as a multi-specialty in Mequon, Wisconsin and active in the NPI registry since June 2006. The organization lists Susan Dwyer, Cfo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Columbia St. Mary's Hospital Milwaukee, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
854Medicare enrollment records show 854 clinicians reassign Medicare billing to Columbia St. Mary's Hospital Milwaukee, Inc, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 109 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 59
Nearest to this location (20)
See all 854Mequon, WI 53097
Mequon, WI 53097
Mequon, WI 53097
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 Columbia St. Mary's Hospital Milwaukee, Inc's NPI number?
The NPI number for Columbia St. Mary's Hospital Milwaukee, Inc is 1710928221. It was assigned to this organization in the NPPES registry on June 8, 2006. The provider is doing business as Ascension Columbia St Mary's Hospital Milwaukee.
Where is Columbia St. Mary's Hospital Milwaukee, Inc located?
Columbia St. Mary's Hospital Milwaukee, Inc is located at 13111 N Port Washington Rd, Mequon, WI 53097. The listed phone number is (414) 270-4932.
What is Columbia St. Mary's Hospital Milwaukee, Inc's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.
Is Columbia St. Mary's Hospital Milwaukee, Inc enrolled in Medicare?
Yes. Columbia St. Mary's Hospital Milwaukee, Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Columbia St. Mary's Hospital Milwaukee, Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 854 clinicians in 59 Medicare specialties reassign their Medicare billing to Columbia St. Mary's Hospital Milwaukee, Inc. A 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 the clinician's services. The largest specialties are Nurse Practitioner (134), Internal Medicine (125) and Family Practice (99). Of these, 3 practice at this address and 109 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Columbia St. Mary's Hospital Milwaukee, Inc accept?
Health plans from Anthem Blue Cross and Blue Shield list Columbia St. Mary's Hospital Milwaukee, Inc 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 Columbia St. Mary's Hospital Milwaukee, Inc was last updated on July 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Columbia St. Mary's Hospital Milwaukee, Inc · NPI 1710928221
Multi-Specialty organization in Mequon, Wisconsin. Organization record, active in the CMS NPPES registry since June 8, 2006.
## Identity
- **NPI:** 1710928221 (Entity type: Organization)
- **Enumerated:** June 8, 2006
- **Primary specialty:** Clinic/Center - Multi-Specialty · taxonomy 261QM1300X
- **Also known as:** Ascension Columbia St Mary's Hospital Milwaukee (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Susan Dwyer, CFO
## Practice location
- **Address:** 13111 N PORT WASHINGTON RD, Mequon, WI 53097-2416
- **Phone:** (414) 270-4932
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 854 clinicians in 59 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (134), Internal Medicine (125), Family Practice (99); 3 practice at this address and 109 within 10 miles; [full list](https://npiprofile.com/npi/1710928221/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 9, 2026
- **Other identifiers:** Medicaid 100008370 (WI)
---
Source: [NPI Profile](https://npiprofile.com/npi/1710928221) · Data from the CMS NPPES public registry.