Jonathon D. Backus, MD

Assistant Professor, Orthopaedic Surgery
Division of Foot and Ankle Surgery

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(314) 514-3500

Dr. Backus specializes in adult foot and ankle care, and has clinical interests in ankle impingement, ankle instability, syndesmosis injuries, osteochondral lesions of the talus, ankle arthritis, and foot and ankle trauma. Dr. Backus also has a special interest in treating sports injuries in athletes of all abilities. He enjoys working collaboratively with his patients and getting them back to their goals as quickly but as safely as possible. 

Common Diagnoses Treated

  • Achilles ruptures
  • Achilles tendonitis
  • Acquired adult flatfoot deformity
  • Ankle and foot deformities
  • Ankle and pilon fractures
  • Ankle arthritis
  • Ankle arthroscopy
  • Ankle sprains (low ankle sprain)
  • Ankle syndesmosis injuries (high ankle sprain)
  • Anterior and posterior ankle impingement,
  • Bunions
  • Cavovarus foot (high arch feet)
  • Claw toes
  • Deltoid ligament injuries
  • Hallux rigidus (great toe arthritis)
  • Hammer toes
  • Hindfoot (calcaneus, talus)
  • Lisfranc ligament injuries (midfoot sprain)
  • Maisonneuve fractures
  • Midfoot arthritis
  • Midfoot and forefoot fractures
  • Morton’s neuroma
  • Osteochondral lesions of the talus
  • Osteochondral lesions of the tibial plafond
  • Peroneal tendon tears and subluxation
  • Planaovalgus foot (flat foot)
  • Plantar plate tears
  • Posterior tibial tendonitis and tendon dysfunction
  • Sesamoiditis
  • Stress fractures
  • Subtalar arthritis
  • Turf toe

Common Procedures

  • Achilles tendon repair
  • Ankle arthroscopy
  • Ankle fracture surgery
  • Ankle fusions
  • Arthroscopic ankle fusions
  • Bunion surgery
  • Calcaneal fracture surgery
  • Cartiva great toe arthroplasty
  • Cavus foot reconstruction
  • Flat foot reconstruction
  • Foot fusions
  • Great toe cheilectomy
  • Great toe fusions
  • Great toe interposition arthroplasty
  • Hammer toe correction
  • Lateral ligament reconstruction
  • Lateral ligament repair
  • Microfracture of the talus and tibia
  • Osteochondral allograft transplant of the talus
  • Peroneal tendon repair
  • Pilon fracture surgery
  • Plantar plate repair
  • Posterior ankle arthroscopy
  • Subtalar arthroscopy
  • Subtalar fusions
  • Total ankle replacement

Clinical Office Locations

Hospital Affiliations

  • Barnes-Jewish Hospital

Academic Office Mailing Address

  • Washington University School of Medicine

    Campus Box 8233

    660 Euclid Avenue

    Saint Louis, MO 63110

MyChart Patient Portal

Patient Education

Featured Articles and Media

Research Interests

Dr. Backus' research interests include syndesmotic anatomy and injuries, ankle instability, Achilles tendon rupture treatment, posttraumatic arthritis, osteochondral lesions of the talus, and foot and ankle trauma.

Clinical Interests

Dr. Backus' clinical interests include ankle impingement, ankle instability, syndesmosis injuries, osteochondral lesions of the talus, ankle arthritis, and foot and ankle trauma.


Dr. Backus attended Duke University for medical school, then completed a residency in Orthopaedic Surgery at Washington University School of Medicine. Following residency, Dr. Backus completed a Foot and Ankle Fellowship at the Steadman Clinic. Prior to joining Washington University Orthopedics, Dr. Backus worked in private practice in Colorado.

Board Certifications

  • Board-Certified, Orthopaedic Surgery

Medical Degree

  • Duke University School of Medicine, Durham, NC


  • Washington University Orthopaedic Surgery Residency Program, St. Louis, MO


  • The Steadman Clinic Foot and Ankle Fellowship Program, Vail, CO

Honors and Awards

  • Graduated Cum Laude with Departmental Distinction, “MeCP2 Promoter Activity during Xenopus Tropicalis Development”
  • Edmund James Scholar: University of Illinois Honors Program
  • Cancer Research Training Award Fellowship, National Cancer Institute 2005
  • AOFAS Resident Scholar, 2013

Sports Team and Event Medical Coverage

  • US Ski and Snowboard Team Pool Physician

Professional Memberships

  • American Academy of Orthopaedic Surgeons
  • American Orthopaedic Foot and Ankle Society
  • US Ski and Snowboard Pool Physician

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