O
- Oncology (Medical) - 2
- Oncology (Radiation) - 1
- Ophthalmology (Eye surgery for cataracts & eye diseases) - 13
- Oral & Maxillofacial Surgery
- Orthodontics - 1
- Orthopedic Surgery - 1
- Orthopedic Surgery - Hand, Foot & Ankle
- Orthopedic Surgery - Hip & Knee
- Orthopedic Surgery - Shoulder & Elbow
- Orthopedic Surgery - Spine/Bone
- Orthopedic Surgery - Tumour/Bone/Oncologic