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    Dr. Katherine A. Berefford, MD

    Sleep Medicine

    • (218) 786-3993

    Dr. Berefford's Overview

    Dr. Berefford graduated from the University of Minnesota Medical School at Minneapolis in 2007. She works in Duluth, MN and specializes in Sleep Medicine. Dr. Berefford is affiliated with Essentia Health Saint Marys Medical Center and Essentia Health-Duluth.

    Dr. Berefford's Experience

    Years in Practice: 9

    Dr. Berefford's Specialties

    Sleep Medicine

    Dr. Berefford's Education & Training

    Medical School: University of Minnesota Medical School at Minneapolis; Graduated 2007

    Dr. Berefford's Rating

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    Overall Rating


    • Explains conditions & treatments
    • Takes time to answer my questions
    • Provides follow-up as needed
    • View All Ratings

    Dr. Berefford's Accepted Insurance

    Please verify insurance information directly with your doctor's office as it may change frequently.

    • Aetna Choice POS II
    • Aetna Managed Choice POS
    • Aetna Managed Choice POS Open Access
    • Aetna Signature Administrators PPO
    • Anthem Blue Access PPO
    • Anthem Blue Preferred HMO
    • Anthem Blue Preferred Plus POS
    • BCBS Blue Card PPO
    • First Health PPO
    • View More

    Dr. Berefford's Office Information & Appointments

    Office Locations

    Duluth Clinic
    Essentia Health Duluth Clinic Pulmonary Sleep Medicine

    400 E 3rd St Fl 3
    Duluth, MN 55805
    (218) 786-3993


    Office Hours and Information

    Fax: (218) 786-4083

    Practice Website:

    Accepting New Patients: Yes

    Medicare Accepted: Yes

    Medicaid Accepted: Yes

    Monday 8:00 AM - 4:00 PM
    Tuesday 8:00 AM - 4:00 PM
    Wednesday 8:00 AM - 4:00 PM
    Thursday 8:00 AM - 4:00 PM
    Friday 8:00 AM - 4:00 PM
    Saturday Closed
    Sunday Closed

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