Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Cortney Del Duffy, PHD

Individual provider Counseling Psychologist · NPI 1740763085

Dr. Cortney Del Duffy, PHD is a Clinical Psychologist in Duluth, Minnesota. Qualified in 2016, 10 years ago. Works from 2 locations and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
10
Licensed in
MN
In the registry since
2018
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

306 W Superior St Ste 405
Duluth, MN 55802-5017
Phone: (218) 203-9335
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2827 Jefferson St, Duluth, MN 55812-2323 — (218) 203-9335

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence LP6283 (MN)
Counseling Psychologist Taxonomy 103TC1900X · Licence LP6283 (MN)

Record details

NPI number1740763085
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedSeptember 12, 2018
Last updated in NPPESJuly 15, 2021
Certification dateJuly 15, 2021
Mailing address2827 Jefferson St, Duluth, MN 55812-2323

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Duluth