Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Halvorsen, RN

Registered Nurse in Chicago, IL · enumerated 2017.

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

National Provider Identifier

1770004186

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Registry record

Entity type Individual (Type 1)

Name Allison Halvorsen

Credential RN

Sex Female

Practice address 1015 W Lawrence Ave, Chicago, IL, 60640

Phone (773) 275-2586

Enumeration date Jul 6, 2017

Last updated in NPPES Jul 6, 2017

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 041.384803 (IL) Primary

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

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 Allison Halvorsen?

The National Provider Identifier (NPI) for Allison Halvorsen is 1770004186, a Type 1 (individual) record in the CMS NPPES registry.

Where does Allison Halvorsen practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-07-06.