Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephanie O'Neill, APRN, FNP-BC

Nurse Practitioner in Warrenville, IL · enumerated 2025.

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

National Provider Identifier

1164383535

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Registry record

Entity type Individual (Type 1)

Name Stephanie O'Neill

Credential APRN, FNP-BC

Sex Female

Practice address 30w160 Oxford Dr, Warrenville, IL, 60555

Phone (630) 281-0629

Enumeration date Nov 24, 2025

Last updated in NPPES Dec 16, 2025

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209.034188 (IL) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN 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

Is NPI 1164383535 active?

Yes, as of the latest NPPES snapshot, NPI 1164383535 is active (record last updated 2025-12-16).

How do I verify Stephanie O'Neill's NPI record?

Cross-check NPI 1164383535 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-16.