Mr Tim Theologis



GMC number: 3347643

Practising since: 1985


Orthopaedic surgery

Consultation times

  • Weekly Wednesday
  • Overview
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01865 307529


Tim Theologis is a Consultant Orthopaedic Surgeon at Oxford University Hospitals NHSFT, Senior Clinical Lecturer at Oxford University and Research Professor at Oxford Brookes University. He has clinical and research links with the Oxford Gait Laboratory. His interests include developmental dysplasia and other paediatric hip conditions, foot biomechanics, musculoskeletal tumours, and neuromuscular disorders, including cerebral palsy. He is involved in clinical research, the supervision of postgraduate degrees and the training of orthopaedic residents. He is Emeritus Editor in Chief for Gait and Posture. He has been a Board member of the British Society for Children’s Orthopaedic Surgery (BSCOS) since 2009 and is BSCOS President 2018-2020.

Special interests

  • All investigations and treatment relevant to the management of children with orthopaedic conditions
  • Children’s orthopaedics
  • Hip dysplasia and other paediatric hip conditions
  • Foot biomechanics / flatfoot
  • Cerebral Palsy

Other interests

  • Gait analysis and the biomechanics of gait
  • Musculoskeletal tumours

Locations Mr Tim Theologis works with


    Beech Road, Headington, Oxford, OX3 7RP

    01865 307777
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Related experience


Mr Theologis’ research work focuses on the orthopaedic management of children with cerebral palsy (CP), the biomechanics of gait and the management of foot conditions in children.

His previous contributions in these fields include the development of the Oxford Foot Model, a biomechanical tool to measure dynamic foot motion during walking. This model is now used internationally by most gait laboratories and is part of the software provided by the main industry producing gait analysis equipment. The Oxford Foot and Ankle Questionnaire was also developed to provide patient/parent based validated information on foot-related disability. In pursuing his interest in cerebral palsy management, he contributed to the development of improved gait analysis techniques with increased accuracy and validity. He organized a randomized prospective trial to demonstrate the loss of muscle strength in CP children undergoing orthopaedic surgery and the benefits of strengthening exercise. On the basis of these findings he developed the minimally invasive multi-level surgery programme at Oxford and published improved results in comparison to conventional methods.


  • British Orthopaedic Association
  • Royal College of Surgeons of England
  • British Society of Children’s Orthopaedic Surgery
  • British Cerebral Palsy Surgery Society
  • European Paediatric Orthopaedic Society
  • European Society of Motion Analysis

Other posts held

  • Consultant Orthopaedic Surgeon Oxford University Hospitals NHSFT

Insurers Mr Tim Theologis works with

Mr Tim Theologis works with the following private medical insurance providers:

  • Aviva Health
  • AXA Health
  • AXA - Global Healthcare
  • Bupa
  • Bupa On Demand
  • Cigna
  • CS Healthcare
  • Exeter Family Friendly
  • Health-on-Line
  • PHC
  • SecureHealth
  • Simplyhealth
  • Vitality Health (Pru Health)
  • Westfield Health WPA
  • WPA


Mr Tim Theologis does not hold a share or financial interest in this hospital, another Nuffield Health hospital or the company.

Mr Tim Theologis does not have a share or financial interest in equipment used at this hospital or another Nuffield Health hospital.

Mr Tim Theologis does not hold any paid advisory role(s) at this hospital or on behalf of Nuffield Health.