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

MARGARET DUFFY ARNP
NPI 1841293503
Nurse Practitioner in Marshalltown, IA

Active since May 24, 2005
407 E MAIN ST, MARSHALLTOWN, IA 50158(641) 752-4681(641) 752-6572 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Margaret Duffy Arnp NPPES

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

MARGARET DUFFY ARNP (NPI 1841293503) is an individual nurse practitioner in Marshalltown, Iowa, licensed in Iowa (#F-054726) and active in the NPI registry since May 2005.

NPPES Registry Identity

NPI1841293503
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMARGARET DUFFYCredential: ARNP
Location Address407 E MAIN STMarshalltown, IA 50158-1928
Mailing Address407 E Main StMarshalltown, IA 50158-1928 · (641) 752-4681 · Fax (641) 752-6572
Phone(641) 752-4681
Fax(641) 752-6572
Sole ProprietorNo
Enumeration DateMay 24, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1841293503 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in IA · #F-054726
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
407 E MAIN ST, Marshalltown, IA 50158
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Other Providers at the Same Location NPPES 4

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

DIANNE RINEHART PA-C
Physician Assistant
407 E MAIN ST
MARSHALLTOWN, IA 50158
Marshall County (641) 752-4681
DR. ANN M GESSNER DO
Obstetrics & Gynecology
407 E MAIN ST
MARSHALLTOWN, IA 50158
Marshall County (641) 752-4681
DR. RICHARD L DOWELL DO
Obstetrics & Gynecology
407 E MAIN ST
MARSHALLTOWN, IA 50158
Marshall County (641) 752-4681
AUTUMN BRITTANY SCHMOKER CNM ARNP
Advanced Practice Midwife
407 E MAIN ST
MARSHALLTOWN, IA 50158
Marshall County (641) 752-4681

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margaret Duffy's NPI number?

The NPI number for Margaret Duffy is 1841293503. It was assigned to this individual provider in the NPPES registry on May 24, 2005.

Where is Margaret Duffy located?

Margaret Duffy practices at 407 E Main St, Marshalltown, IA 50158. The listed phone number is (641) 752-4681.

What is Margaret Duffy's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

When was this NPI record last updated?

The NPPES record for Margaret Duffy was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 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.