Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Erin C Lassanske, NP

Family Nurse Practitioner in Milwaukee, WI · enumerated 2005.

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

National Provider Identifier

1235135559

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mrs. Erin C Lassanske

Credential NP

Sex Female

Practice address 2901 W Kk River Pkwy, Ste 305, Milwaukee, WI, 53215

Phone (414) 645-6070

Fax (414) 645-6354

Enumeration date Jun 22, 2005

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 2564-33 (WI) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

Other identifiers

Identifier	Type	State	Issuer
41195700	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

Is NPI 1235135559 active?

Yes, as of the latest NPPES snapshot, NPI 1235135559 is active (record last updated 2007-07-09).

How do I verify Erin Lassanske's NPI record?

Cross-check NPI 1235135559 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Imran Niazi Clinical Cardiac Electrophysiology Physician · Milwaukee, WI NPI 1689670754 Franklin Loo Gastroenterology Physician · Milwaukee, WI NPI 1376505255 Jeffrey Weber Gastroenterology Physician · Milwaukee, WI NPI 1962465047 Elizabeth Brigden Physician Assistant · Milwaukee, WI NPI 1235192329 Abe F. Goldbaum M.D., S.C. Sports Medicine (Neuromusculoskeletal Medicine) Physician · Milwaukee, WI NPI 1447332887 Nilay Kumar Gastroenterology Physician · Milwaukee, WI NPI 1427123702 Howard Zeft Cardiovascular Disease Physician · Milwaukee, WI NPI 1649336694 Milwaukee Digestive Disease Consultants, S.C. Specialist · Milwaukee, WI NPI 1952447336

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