Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Stefanie Lauren O'Neill

Specialist in New York, NY · enumerated 2012.

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

National Provider Identifier

1609138940

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Registry record

Entity type Individual (Type 1)

Name Ms. Stefanie Lauren O'Neill

Sex Female

Practice address 236 2nd Ave, Suite 401, New York, NY, 10003

Phone (212) 683-8905

Enumeration date Jun 12, 2012

Last updated in NPPES Jun 12, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers 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.

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Frequently asked questions

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

Cross-check NPI 1609138940 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609138940 active?

Yes, as of the latest NPPES snapshot, NPI 1609138940 is active (record last updated 2012-06-12).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-12.