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Dr. Johnston is on Doximity

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Education & Training

  • Dartmouth-Hitchcock/Mary Hitchcock Memorial Hospital
    Dartmouth-Hitchcock/Mary Hitchcock Memorial HospitalResidency, Surgery, 2020
  • University of Utah School of Medicine
    University of Utah School of MedicineClass of 2020

Certifications & Licensure

  • NH State Medical License
    NH State Medical License 2023 - 2025