Cortney Duffy, PH.D.
NPI 1740763085 · Clinical Psychologist · Duluth, MN
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cortney Duffy, PH.D. is a Clinical Psychologist provider in Duluth, MN (NPI 1740763085).
Provider details
- NPI number
- 1740763085
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- LP6283 (MN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 2827 Jefferson StDuluth, MN 55812-2323Phone: (218) 203-9335
Registry dates
- Enumerated
- 2018-09-12
- Last updated
- 2021-07-15
- Certified
- 2021-07-15
Frequently asked questions
- What is Cortney Duffy's NPI number?
- Cortney Duffy's National Provider Identifier (NPI) is 1740763085, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cortney Duffy's specialty?
- Cortney Duffy is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Cortney Duffy located?
- Cortney Duffy's practice location on file with NPPES is 306 W Superior St Ste 405, Duluth, MN 55802-5017.
- What is Cortney Duffy's phone number?
- The practice phone number listed in the NPPES registry for Cortney Duffy is (218) 203-9335.
- Does Cortney Duffy accept Medicare?
- Cortney Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cortney Duffy's NPI active?
- Yes — Cortney Duffy's NPI (1740763085) is active in the NPPES registry as of the last update on 2021-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.