Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Madison Area Renal Specialists, Sc

Q: What is the NPI number for Madison Area Renal Specialists, Sc?

The NPI for Madison Area Renal Specialists, Sc is 1104834894, a Type 2 (organization) record in the CMS NPPES registry.

Nephrology Physician in Fitchburg, WI · enumerated 2006 · authorized official Christoph Eggert, MD.

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

National Provider Identifier

1104834894

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Registry record

Entity type Organization (Type 2)

Legal business name Madison Area Renal Specialists, Sc

Practice address 2840 Index Rd, Fitchburg, WI, 53713

Phone (608) 229-7221

Fax (608) 826-2710

Enumeration date Aug 4, 2006

Last updated in NPPES Apr 9, 2021

Taxonomy & classification

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Christoph Eggert

Title MD

Phone (608) 229-7221

Other identifiers

Identifier	Type	State	Issuer
21271100	Medicaid	WI	-

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.

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Frequently asked questions

What is the NPI number for Madison Area Renal Specialists, Sc?

The NPI for Madison Area Renal Specialists, Sc is 1104834894, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Madison Area Renal Specialists, Sc?

NPPES lists Christoph Eggert (MD) as the authorized official for this organization.

Providers at this address

Browse all →

Christoph Eggert Nephrology Physician · Fitchburg, WI NPI 1598738247 Ssm Health Care of Wisconsin,Inc End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Fitchburg, WI NPI 1033152939 Deborah Loomis Physician Assistant · Fitchburg, WI NPI 1003820515 Diane Yee Renal Nutrition Registered Dietitian · Fitchburg, WI NPI 1811261035 Bio-Medical Applications of Wisconsin, Inc. End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Fitchburg, WI NPI 1013301779 Jennifer Lamba Physician Assistant · Fitchburg, WI NPI 1093439721 Isabella Hofbauer Family Nurse Practitioner · Fitchburg, WI NPI 1407798671

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-09.