Professor Mark O'Donnell is a highly experienced Consultant Vascular and Endovascular Surgeon serving patients throughout Northern Ireland and Ireland. He provides expert diagnosis and treatment for varicose veins, arterial disease, aneurysms and other vascular conditions using the latest minimally invasive techniques wherever appropriate. With over 20 years' experience and advanced fellowship training at the Mayo Clinic, Professor O'Donnell delivers personalised, consultant-led care focused on achieving the best possible outcomes. Consultations are available at leading private clinics across Northern Ireland, including Belfast, Ballykelly, Newry and Hillsborough.