Consult a Board Certified Doctor in the Field of Medicine they actually Practice!
Being an expert in the field of vein disease means knowing how to do Endovenous Laser Therapy or Ablation, doing it well, and when to do it. These things don not come from moonlighting or practicing another specialty while treating varicose and spider veins on the side.
They come from specialization and certification - steps that dedicated physicians take to master and demonstrate their expertise. They take the time to care about what they practice and the ways their knowledge (or lack thereof) will affect those they treat.