Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William J Langen II, R.N.

Home Health Registered Nurse in Greenfield, WI · enumerated 2006.

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

National Provider Identifier

1548213234

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Registry record

Entity type Individual (Type 1)

Name William J Langen II

Credential R.N.

Sex Male

Practice address 10105 W Plainfield Ave, Greenfield, WI, 53228

Phone (414) 425-7575

Enumeration date May 17, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

163WH0200X Home Health Registered Nurse Nursing Service Providers Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
38298000	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Langen?

The National Provider Identifier (NPI) for William Langen is 1548213234, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Langen practice?

The practice location on file with NPPES is in Greenfield, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.