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

John P. Duffy

Pharmacist in Emerson, NJ · enumerated 2012 · practices at Emerson Pharmacy Compounding.

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

National Provider Identifier

1750654844

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Registry record

Entity type Individual (Type 1)

Name John P. Duffy

Sex Male

Practice address Emerson, NJ, 07630

Phone (201) 262-4999

Enumeration date Feb 20, 2012

Last updated in NPPES Feb 20, 2012

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

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 28RI02146200 (NJ) 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 John Duffy's NPI record?

Cross-check NPI 1750654844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1750654844 active?

Yes — as of the latest NPPES snapshot, NPI 1750654844 is active (record last updated 2012-02-20).

Other providers at this practice address

Browse all →

Tara Fricke Pharmacist · Emerson, NJ NPI 1649594615 Kurt D'Alessandro Pharmacist · Emerson, NJ NPI 1063737344 Lia Petrocelli Pharmacist · Emerson, NJ NPI 1841515046 Emerson Pharmacy Compounding Compounding Pharmacy · Emerson, NJ NPI 1215219852

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-20.