Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Arthur C Downie, NP

Adult Health Nurse Practitioner in Niagara Falls, NY · enumerated 2014.

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

National Provider Identifier

1023421211

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Registry record

Entity type Individual (Type 1)

Name Arthur C Downie

Credential NP

Sex Male

Practice address Niagara Falls, NY, 14304

Phone (716) 298-4869

Fax (888) 847-3060

Enumeration date Jun 5, 2014

Last updated in NPPES Jun 5, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 306872 (NY) 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

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 1023421211 active?

Yes, as of the latest NPPES snapshot, NPI 1023421211 is active (record last updated 2014-06-05).

How do I verify Arthur Downie's NPI record?

Cross-check NPI 1023421211 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-06-05.