MERCY HEALTH SYSTEM CORPORATION
NPI 1598718603
Clinic/Center - Multi-Specialty in Janesville, WI
About Mercy Health System Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MERCY HEALTH SYSTEM CORPORATION (NPI 1598718603), doing business as Mhs Physician Services, is a healthcare organization registered as a multi-specialty in Janesville, Wisconsin and active in the NPI registry since May 2006. The organization lists Patricia Lynne Allen, Cfo - Authorized Official, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 2
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)
Mercy Health System Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
1,611Medicare enrollment records show 1,611 clinicians reassign Medicare billing to Mercy Health System Corporation, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 333 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 67
Nearest to this location (20)
See all 1,611Source: 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 Mercy Health System Corporation's NPI number?
The NPI number for Mercy Health System Corporation is 1598718603. It was assigned to this organization in the NPPES registry on May 18, 2006. The provider is doing business as Mhs Physician Services.
Where is Mercy Health System Corporation located?
Mercy Health System Corporation is located at 580 N Washington St, Janesville, WI 53548. The listed phone number is (608) 741-7630.
What is Mercy Health System Corporation's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Multi-Specialty, with taxonomy code 261QM1300X.
Is Mercy Health System Corporation enrolled in Medicare?
Yes. Mercy Health System Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mercy Health System Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1,611 clinicians in 67 Medicare specialties reassign their Medicare billing to Mercy Health System Corporation. 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 Emergency Medicine (183), Nurse Practitioner (178) and Family Practice (141). Of these, 2 practice at this address and 333 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Mercy Health System Corporation accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Montana and Blue Cross and Blue Shield of Oklahoma and 4 other insurers list Mercy Health System Corporation 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 Mercy Health System Corporation was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days 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.
# Mercy Health System Corporation · NPI 1598718603
Multi-Specialty organization in Janesville, Wisconsin. Organization record, active in the CMS NPPES registry since May 18, 2006.
## Identity
- **NPI:** 1598718603 (Entity type: Organization)
- **Enumerated:** May 18, 2006
- **Primary specialty:** Clinic/Center - Multi-Specialty · taxonomy 261QM1300X
- **Also known as:** MHS PHYSICIAN SERVICES (Doing Business As)
- **Organization subpart:** Yes (part of Mercy Health Corporation)
- **Authorized official:** Patricia Allen, CFO - AUTHORIZED OFFICIAL
## Practice location
- **Address:** 580 N WASHINGTON ST, Janesville, WI 53548-2984
- **Phone:** (608) 741-7630 · **Fax:** (608) 741-6890
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1,611 clinicians in 67 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (183), Nurse Practitioner (178), Family Practice (141); 2 practice at this address and 333 within 10 miles; [full list](https://npiprofile.com/npi/1598718603/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 28, 2026
- **Other identifiers:** Medicaid 32796500 (WI); Other 5621473 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1598718603) · Data from the CMS NPPES public registry.