John W. Diefenderfer

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

Patient Rating
4.8 out of 5 (30 Ratings, 12 Comments)
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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

August 24, 2026
Staff is always professional and caring about every step!
July 13, 2026
Dr D was wonderful, he wrote down my exercises for me, he explained my issue so well, and he knew my history. I feel so much better all ready.
May 18, 2026
Dr. D was caring and communitive. He was knowledgeable and even offered a suggestion for another intervention. I have been very pleased with every provider I have seen there.
April 21, 2026
I love this practice
April 21, 2026
This treatment option is phenomenal. The providers are absolutely fantastic. The only unfortunate thing is there are not enough providers and you can't get seen any more frequently than eight weeks or more. I have had such incredible results but would do so much better if I could be seen more frequently.
March 30, 2026
Dr. Diefenderfer worked on my shoulder. Everything is so interactive, and I get to learn along with the residents!
February 24, 2026
A++ all around. Everything was excellent - from check-in to meeting with the doctor. This was the first time meeting with this doctor. He explained what type of doctor he was and what type of procedures he does. He knew about my medical history. He did the most thorough exam I have ever had. I was not rushed at all. He listen and answered all my questions.
February 17, 2026
Very helpful
January 26, 2026
Dr. D is kind and caring. He is also very meticulous and knowledgeable! I know I'm in good hands!
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
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