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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.

ROBERT DALE NIEDRINGHAUS
NPI 1013947993
Internal Medicine - Hematology in Duluth, MN

Active since July 04, 2006
400 E 3RD ST, DULUTH, MN 55805(218) 786-8364 Get Directions Write a Review

NPPES record last updated: July 12, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Robert Dale Niedringhaus NPPES

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

ROBERT DALE NIEDRINGHAUS (NPI 1013947993) is an individual hematology provider in Duluth, Minnesota, licensed in Wisconsin (26690-20) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1013947993
Entity TypeIndividualMale
Primary Taxonomy207RH0000X
Provider Legal NameROBERT DALE NIEDRINGHAUS
Location Address400 E 3RD STDuluth, MN 55805-1951
Mailing Address400 E 3rd StDuluth, MN 55805-1951 · (218) 786-8364
Phone(218) 786-8364
Sole ProprietorNo
Enumeration DateJuly 4, 2006
Last NPPES UpdateJuly 12, 2026
✔ NPI 1013947993 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · HematologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0000X
Licenses✔ Licensed in WI · 26690-20✔ Licensed in MN · 18665
Definition
An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.
400 E 3RD ST, Duluth, MN 55805
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Other Identifiers 2

Medicaid521085200MN
Medicaid31287000WI

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.

CHRISTIAN CONNER RN, CRNA
Nurse Anesthetist, Certified Registered
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-4150
JORDAN TICHENOR
Internal Medicine (Infectious Disease)
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-3737
MOLLY B DWYER APRN, CNP
Nurse Practitioner (Psychiatric/Mental Health)
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364
AMY MARIE LARSON MD
Hospitalist
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364
BRUCE JAMES DERAUF
Radiology (Diagnostic Radiology)
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364
NIZAR NAJIB SALEH
Internal Medicine (Cardiovascular Disease)
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364
DIANE MAE KOLQUIST
Clinical Nurse Specialist (Medical-Surgical)
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364
GINA MARIE SLIPKA-MARINOS
Internal Medicine
400 E 3RD ST
DULUTH, MN 55805
St. Louis County (218) 786-8364

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 Robert Niedringhaus's NPI number?

The NPI number for Robert Niedringhaus is 1013947993. It was assigned to this individual provider in the NPPES registry on July 4, 2006.

Where is Robert Niedringhaus located?

Robert Niedringhaus practices at 400 E 3rd St, Duluth, MN 55805. The listed phone number is (218) 786-8364.

What is Robert Niedringhaus's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.

When was this NPI record last updated?

The NPPES record for Robert Niedringhaus was last updated on July 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 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.