John W. Diefenderfer

John W. Diefenderfer, DO, CAQSM, C-NMM/OMM

Patient Rating
4.8 out of 5 (30 Ratings, 7 Comments)
Name Pronunciation:

Profile

Gender:
Male

Specialties:

Family Medicine, Osteopathic Neuromusculoskeletal Medicine, and Sports Medicine

Areas of Interest

John Diefenderfer, DO, CAQSM, C-NMM/OMM, is an osteopathic family medicine, sports medicine and neuromusculoskeletal medicine specialist who treats patients as part of the clinical teams at the Maine-Dartmouth Collaborative Care Center, located at the Ballard Center in Augusta, and the Maine-Dartmouth Family Practice, located at Thayer Center for Health in Waterville. He serves as Director of Osteopathic Education for the Maine-Dartmouth Family Medicine Residency program and splits his faculty time between the Family Medicine and Osteopathic Neuromusculoskeletal Medicine residencies.

Languages Spoken

  • English

Education

Education

2015
West Virginia School of Osteopathic Medicine, Lewisburg, WV, Medical School

Residency

2018
St. Vincent's Family Medicine Residency, Jacksonville, FL, Family Medicine
2019-2020
Maine-Dartmouth ONMM3 Residency, Augusta, ME, Osteopathic Neuromusculoskeletal Medicine

Fellowship

2018-2019
Maine Dartmouth Sports Medicine Fellowship, Augusta, ME, Sports Medicine

Professional Memberships

  • American College of Osteopathic Family Physicians
  • American Osteopathic Association
  • Maine Osteopathic Association
  • American Academy of Osteopathy
  • American Academy of Family Physicians
  • American Medical Society for Sports Medicine

Honors, Awards, etc.

  • 2024 National Emerging Leader Award, American Osteopathic Foundation
  • 2024 State Emerging Leader for Maine Award, Maine Osteopathic Association
  • Sigma Sigma Phi Honorary Osteopathic Service Fraternity
  • Maine Osteopathic Association's Young Physician of the Year Award for 2022

Office Information

Locations

Patient Reviews

November 18, 2025
I love coming to the Dartmouth Collaborative because they are so knowledgeable, respectful and efficient!
September 30, 2025
Dr. D was excellent, very professional and explained everything well.
September 22, 2025
Dr D was very comforting, explained everything he was going to do and included me in what was to happen next
May 12, 2025
Efficient and caring always!
April 25, 2025
Provider was 30 min late and then only spent about 20 min with me. Way too quick and not very thorough.
March 21, 2025
The staff truly goes above and beyond I'm so grateful for everyone that helped me. Katie the OB nurse is absolutely amazing
January 13, 2025
Very professional. Comprehensive in discussing my treatment. Very compationate, willing to help to achieve a positive outcome. Great staff. Thanks so much
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