Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Mercy Health System Corporation

Q: What is the NPI number for Mercy Health System Corporation?

The NPI for Mercy Health System Corporation is 1598718603, a Type 2 (organization) record in the CMS NPPES registry.

Multi-Specialty Clinic/Center in Janesville, WI · enumerated 2006 · authorized official Joseph Malas, Cfo - Authorized Official.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1598718603

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Registry record

Entity type Organization (Type 2)

Legal business name Mercy Health System Corporation

Other name <Unavail>

Parent organization Mercy Health Corporation

Practice address 580 N Washington St, Janesville, WI, 53548

Phone (608) 741-7630

Fax (608) 741-6890

Enumeration date May 18, 2006

Last updated in NPPES Feb 25, 2026

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities · License 310800 (WI) Secondary

261QM1300X Multi-Specialty Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Joseph Malas

Title Cfo - Authorized Official

Phone (815) 971-6738

Other identifiers

Identifier	Type	State	Issuer
32796500	Medicaid	WI	-
5621473	Other	IL	BCBSIL

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Mercy Health System Corporation?

NPPES lists Joseph Malas (Cfo - Authorized Official) as the authorized official for this organization.

What is the NPI number for Mercy Health System Corporation?

The NPI for Mercy Health System Corporation is 1598718603, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

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Thomas Mccoy Physical Medicine & Rehabilitation Physician · Janesville, WI NPI 1073579595 Audrey Shomos Registered Dietitian · Janesville, WI NPI 1336105881 Bruce Pearson Dermatology Physician · Janesville, WI NPI 1518919919 Stanley Gruhn Internal Medicine Physician · Janesville, WI NPI 1760437081 James Vogel Obstetrics & Gynecology Physician · Janesville, WI NPI 1568403749 Rock Valley Radiology, Sc Diagnostic Radiology Physician · Janesville, WI NPI 1245269372 Dennis Litsheim Diagnostic Radiology Physician · Janesville, WI NPI 1659300705 Dean Health Systems, Inc Durable Medical Equipment & Medical Supplies · Janesville, WI NPI 1780695502

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-25.