Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. MARY ELIZABETH DUFFY DNPC, FNP
NPI 1851534671
Nurse Practitioner - Psychiatric/Mental Health in Hoboken, NJ

Q: What is Mary Duffy's NPI number?

The NPI number for Mary Duffy is 1851534671. It was assigned to this individual provider in the NPPES registry on April 8, 2009.

Q: What is Mary Duffy's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Q: When was this NPI record last updated?

The NPPES record for Mary Duffy was last updated on July 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 43 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 08, 2009

221 RIVER ST STE 9, HOBOKEN, NJ 07030(646) 941-7645(929) 596-7897 Get Directions Write a Review

NPPES record last updated: July 22, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jul 22, 2026, Apr 25, 2018 (2 updates tracked since 2018).

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About Ms. Mary Elizabeth Duffy Dnpc, Fnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. MARY ELIZABETH DUFFY DNPC, FNP (NPI 1851534671) is an individual psychiatric/mental health provider in Hoboken, New Jersey, licensed in New Jersey (26NJ00136400) and active in the NPI registry since April 2009. She maintains a secondary practice location in New York.

NPPES Registry Identity

NPI1851534671

Entity TypeIndividualFemale

Primary Taxonomy363LP0808X

Provider Legal NameMS. MARY ELIZABETH DUFFYCredential: DNPC, FNP

Location Address221 RIVER ST STE 9Hoboken, NJ 07030-5990

Mailing Address177 Fort Washington Ave Fl 7New York, NY 10032-3733 · (212) 305-0407 · Fax (212) 305-2439

Phone(646) 941-7645

Fax(929) 596-7897

Sole ProprietorNo

Enumeration DateApril 8, 2009

Last NPPES UpdateJuly 22, 20262 updates tracked since enumeration

NPPES CertifiedJuly 22, 2026

✔ NPI 1851534671 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0808X

License✔ Licensed in NJ · 26NJ00136400

Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License F430651 (NY)

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 26NJ00136400 (NJ), F332093 (NY)

221 RIVER ST STE 9, Hoboken, NJ 07030

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Secondary Practice Location 1

Location 1177 Fort Washington Ave Fl 7New York, NY 10032-3733 · Phone (212) 305-0407 · Fax (212) 305-2439

Other Identifiers 1

MedicaidF332093NY

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KETNIE V ARISTIDE

Nurse Practitioner (Psychiatric/Mental Health)