John Callaghan, M.D.

Orthopaedic Trauma Surgeon

John Callaghan, M.D.John Callaghan, M.D.

John Callaghan, MD is a fellowship-trained and board-certified orthopaedic trauma specialist. Dr. Callaghan joined Northlands Orthopedic Institute in 2015. His expertise encompasses the treatment of acute traumatic injuries, including complex periarticular fractures, pelvic and acetabular injuries, and polytrauma. He also treats the complications arising from orthopaedic injuries, such as fracture non-union, malunion, infection, and post-traumatic arthritis.

Dr. Callaghan completed his undergraduate education at the United States Air Force Academy and Washington University in Saint Louis, where he graduated with honors. Dr. Callaghan earned his medical degree from New York Medical College. He completed residency training in Orthopaedic Surgery at Seton Hall-St. Joseph's Regional Medical Center and served as Chief Resident.

Dr. Callaghan then completed an orthopaedic trauma fellowship at the renowned Parkland Memorial Hospital in Dallas, Texas, where he became skilled in the latest techniques in orthopaedic trauma surgery. While at Parkland, Dr. Callaghan also gained expertise in the percutaneous treatment of pelvic and acetabular fractures under the guidance of Adam J. Starr and Charles M. Reinert, two of the most distinguished innovators in the field. He is an active member of the American Academy of Orthopaedic Surgeons (AAOS), AO Trauma Foundation, and Orthopaedic Trauma Society (OTA).


  • Undergraduate: United States Air Force Academy and Washington University
  • Medical School: New York Medical College
  • Residency: Seton Hall-St. Joseph's Regional Medical Center
  • Trauma Fellowship: Parkland Memorial Hospital - Dallas, Tx


Dr. Callaghan has published numerous articles in peer-reviewed journals, as well as presented research and given instructional lectures at various meetings and conferences. His work covers topics ranging from orthopaedic trauma to adult joint reconstruction.


  • Adult and Pediatric Complex Fractures
  • Non-unions
  • Limb Deformity
  • Musculoskeletal Infections Post-Traumatic Arthritis
  • Specializing in Muscle Sparing Mako Robotic Assisted Total Knee and Hip Replacement

Patient Reviews

"Dr. Callaghan surgically repaired my fractured fibula. He was great about answering all my questions and following up. And he was very realistic about setting expectations for rehab and recovery. Excellent doctor!"

3 years ago I was in an auto accident resulting in severe injury to both legs, knees & ankles. Drs Callaghan, Mcinerney, Wright and the trauma team’s expertise & compassion during the numerous surgeries have made it possible to walk again. My family & I survived this journey because of NJOI.

~Susan S

Dr callaghan is the most kindness compassionate expert doctor i broke my leg a year ago and dislocated my knee hé took such great Care of me and really Care how i was feeling i would recommend him to anyone.

~Eileen M S

Dear Dr. Callaghan, Words cannot explain how thankful and grateful I am to have you be apart of this long journey. May God bless you. Thanks for everything you have done for me.

~Ramon C

I am forever grateful to Dr. Callaghan for setting my broken wrist after a sudden fall in late March, 2017. The physician on call for Dr. Mc Inerney at Chilton that Sunday, Dr. Callaghan was my God-send. Competent, confident, calm, and kind, he reassured me that my wrist would heal perfectly--and it did! He was not at all surprised by the unusual appearance of my broken bone but simply asked a few questions and began his skilled work and remedied my brokenness. God bless him always!


Dr. Callaghan surgically repaired my fractured fibula. He was great about answering all my questions and following up. And he was very realistic about setting expectations for rehab and recovery. Excellent doctor!

Dr. Callaghan was my surgeon after a traumatic accident that injured both my legs. I received high quality care from the skilled hands of Dr. Callaghan. He evaluated my condition carefully and took the necessary steps to eliminate the possibility of infection and did an excellent job with my surgery. Dedicated, honest, friendly, professional and knowledgeable on the latest techniques. Thank you for a successful experience.


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