Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher John Walsh, MD

Urology Physician in Wauwatosa, WI · enumerated 2006.

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

National Provider Identifier

1811966955

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Registry record

Entity type Individual (Type 1)

Name Christopher John Walsh

Credential MD

Sex Male

Practice address 2600 N Mayfair Rd, Ste 545, Wauwatosa, WI, 53226

Phone (414) 476-0430

Fax (414) 476-3242

Enumeration date Mar 14, 2006

Last updated in NPPES Nov 14, 2023

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 42112020 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
33329500	Medicaid	WI	-
340018221	Other	WI	MEDICARE RAILROAD

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

Is NPI 1811966955 active?

Yes, as of the latest NPPES snapshot, NPI 1811966955 is active (record last updated 2023-11-14).

How do I verify Christopher Walsh's NPI record?

Cross-check NPI 1811966955 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-14.