NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary E Limbach, NNP

Nurse Practitioner in Grafton, WI · enumerated 2014 · practices at Aurora Medical Center Grafton.

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

National Provider Identifier

1861890873

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mary E Limbach
Credential NNP
Sex Female
Practice address 975 Port Washington Rd, Grafton, WI, 53024
Phone (262) 329-1000
Enumeration date Dec 8, 2014
Last updated in NPPES May 19, 2020

Taxonomy & licenses

363LN0005X Critical Care Neonatal Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6150-33 (WI) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6150 (WI) Primary

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

Where does Mary Limbach practice?
The practice location on file with NPPES is in Grafton, WI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Limbach?
The National Provider Identifier (NPI) for Mary Limbach is 1861890873, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-19.