MERCY HEALTH SYSTEM CORPORATION
NPI 1699728550
General Acute Care Hospital - Critical Access in Lake Geneva, 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 1699728550), doing business as Mercy Walworth Hospital And Medical Center, is a healthcare organization registered as a critical access in Lake Geneva, Wisconsin and active in the NPI registry since May 2006. The organization lists Patricia Lynne Allen, Cfo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
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)
Mercy Health System Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
271Medicare enrollment records show 271 clinicians reassign Medicare billing to Mercy Health System Corporation, which bills Medicare for the services they deliver. Of these, 28 practice at this address and 41 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 46
Nearest to this location (20)
See all 271Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Medical Equipment Supplier Medicare DMEPOS 7
Medicare supplier enrollment and the product categories Mercy Health System Corporation carries, from the Medicare DMEPOS supplier directory.
Mercy Health System Corporation
DMEPOS supplier · Lake Geneva, WIAccepts Medicare assignment
Mercy Health System Corporation agrees to accept the Medicare-approved amount as full payment for covered equipment and supplies. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Product Categories
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 1699728550. It was assigned to this organization in the NPPES registry on May 19, 2006. The provider is doing business as Mercy Walworth Hospital And Medical Center.
Where is Mercy Health System Corporation located?
Mercy Health System Corporation is located at N2950 State Road 67, Lake Geneva, WI 53147. The listed phone number is (262) 245-0535.
What is Mercy Health System Corporation's specialty?
The primary specialty registered for this NPI is General Acute Care Hospital, specializing in Critical Access, with taxonomy code 282NC0060X.
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), 271 clinicians in 46 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 (70), Nurse Practitioner (34) and Psychiatry (25). Of these, 28 practice at this address and 41 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Mercy Health System Corporation accept Medicare assignment for medical equipment?
Yes. As a Medicare medical equipment supplier, Mercy Health System Corporation accepts Medicare assignment: the supplier accepts the Medicare-approved amount as payment in full for covered equipment and supplies.
What insurance does Mercy Health System Corporation accept?
Health plans from Anthem Blue Cross and Blue Shield and MercyCare Health Plans 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 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 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 1699728550
Critical Access organization in Lake Geneva, Wisconsin. Organization record, active in the CMS NPPES registry since May 19, 2006.
## Identity
- **NPI:** 1699728550 (Entity type: Organization)
- **Enumerated:** May 19, 2006
- **Primary specialty:** General Acute Care Hospital - Critical Access · taxonomy 282NC0060X
- **Also known as:** MERCY WALWORTH HOSPITAL AND MEDICAL CENTER (Doing Business As)
- **Organization subpart:** Yes (part of Mercy Health Corporation)
- **Authorized official:** Patricia Allen, CFO
## Practice location
- **Address:** N2950 STATE ROAD 67, Lake Geneva, WI 53147-2655
- **Phone:** (262) 245-0535 · **Fax:** (262) 245-2198
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 271 clinicians in 46 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (70), Nurse Practitioner (34), Psychiatry (25); 28 practice at this address and 41 within 10 miles; [full list](https://npiprofile.com/npi/1699728550/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 23, 2026
- **Other identifiers:** Medicaid 11024910 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1699728550) · Data from the CMS NPPES public registry.