what is a vein specialist called : Sometimes people ignore the varicose veins and leave them untreated for longer times. This may result in severe complications like leg ulcers, fatigue, and many more. In such a condition you are advised to visit a vein specialist. What is a vein specialist called? A vein specialist is a vascular surgeon who has expertise in precise diagnosis and treatments. He or She treats a range of health issues regarding varicose and spider veins.