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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

AGNIESZKA DUFFANY FNP
NPI 1376452953
Nurse Practitioner - Family in Harwich, MA

Active since September 01, 2026
525 LONG POND DR, HARWICH, MA 02645(774) 487-2233 Get Directions Write a Review

NPPES record added: September 1, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Agnieszka Duffany Fnp NPPES

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

AGNIESZKA DUFFANY FNP (NPI 1376452953) is an individual family provider in Harwich, Massachusetts, licensed in Massachusetts (RN2318107) and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1376452953
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameAGNIESZKA DUFFANYCredential: FNP
Location Address525 LONG POND DRHarwich, MA 02645-1227
Mailing Address525 Long Pond DrHarwich, MA 02645-1227 · (774) 487-2233
Phone(774) 487-2233
Sole ProprietorYes
Enumeration DateSeptember 1, 2026
NPPES CertifiedSeptember 1, 2026
✔ NPI 1376452953 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in MA · RN2318107
525 LONG POND DR, Harwich, MA 02645
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 10

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

DR. LOUIS ALAN HIEB DO
Family Medicine
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (508) 432-4100
DR. PATRICK JOHN GUBBINS PSY.D.
Psychologist
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (508) 430-3350
CAPE COD PET/CT SERVICES, LLC
Clinic/Center (Radiology, Mobile)
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (866) 258-4738
JENNIFER R BAI AGNP-BC
Nurse Practitioner (Adult Health)
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (917) 659-8300
DR. ALICE BARTON MD
Internal Medicine
525 LONG POND DR, FONTAINE MEDICAL CENTER
HARWICH, MA 02645
Barnstable County (508) 432-4100
ZIAD G FARAH MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
525 LONG POND DR, FONTAINE MEDICAL CENTER
HARWICH, MA 02645
Barnstable County (508) 432-4100
EVAN LLEWELLYN GUTHRIE M.D.
Family Medicine
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (508) 430-3322
KATRIN SARA SADIGH M.D.
Internal Medicine
525 LONG POND DR
HARWICH, MA 02645
Barnstable County (508) 430-3322

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 Agnieszka Duffany's NPI number?

The NPI number for Agnieszka Duffany is 1376452953. It was assigned to this individual provider in the NPPES registry on September 1, 2026.

Where is Agnieszka Duffany located?

Agnieszka Duffany practices at 525 Long Pond Dr, Harwich, MA 02645. The listed phone number is (774) 487-2233.

What is Agnieszka Duffany's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

When was this NPI record last updated?

The NPPES record for Agnieszka Duffany was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.