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DOUGLAS P DUFFY MD
NPI 1366542227
Internal Medicine - Nephrology in Marshfield, WI

Active since September 22, 2006
1000 N OAK AVE, MARSHFIELD, WI 54449(715) 387-5345 Get Directions Write a Review

NPPES record last updated: August 1, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Douglas P Duffy Md NPPES

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

DOUGLAS P DUFFY MD (NPI 1366542227) is an individual nephrology provider in Marshfield, Wisconsin, licensed in Wisconsin (25241) and active in the NPI registry since September 2006. He maintains a secondary practice location in Fargo.

NPPES Registry Identity

NPI1366542227
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDOUGLAS P DUFFYCredential: MD
Location Address1000 N OAK AVEMarshfield, WI 54449
Mailing Address1000 N Oak AveMarshfield, WI 54449-5777
Phone(715) 387-5345
Sole ProprietorNo
Enumeration DateSeptember 22, 2006
Last NPPES UpdateAugust 1, 2018
✔ NPI 1366542227 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses✔ Licensed in WI · 25241✔ Licensed in ND · LT15265
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedInternal MedicineTaxonomy 207R00000X · License 25241 (WI)
1000 N OAK AVE, Marshfield, WI 54449
Open in Google Maps ↗

Secondary Practice Location 1

Location 1801 Broadway NFargo, ND 58102-3641 · Phone (701) 234-2000

Other Identifiers 3

OtherLT15265ND · Nd License #
Other207RN0300XND · Taxonomy
Medicaid30517100WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of North Dakota.Insurance ›

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.

ALISON RAE SAMPSON D.O.
Obstetrics & Gynecology
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5161
TAMARA L. LEAHY NP
Nurse Practitioner
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (800) 782-8581
SAMANTHA ELAINE MOORE RD, CD, CDCES
Dietitian, Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-7464
ROBERT BUNDY
Student in an Organized Health Care Education/Training Program
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5511
EUGENE H. LARSON PA
Physician Assistant
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5245
JAMES SKIBBA CRNA
Nurse Anesthetist, Certified Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-7179
KENNETH E ENGELHART MD
Internal Medicine
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5704
KRISTIN M GERNDT MD
Radiology (Vascular & Interventional Radiology)
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-3474

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 Douglas Duffy's NPI number?

The NPI number for Douglas Duffy is 1366542227. It was assigned to this individual provider in the NPPES registry on September 22, 2006.

Where is Douglas Duffy located?

Douglas Duffy practices at 1000 N Oak Ave, Marshfield, WI 54449. The listed phone number is (715) 387-5345.

What is Douglas Duffy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

What insurance does Douglas Duffy accept?

Health plans from Blue Cross Blue Shield of North Dakota list Douglas Duffy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Douglas Duffy was last updated on August 1, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.