phlebology
noun
phle·bol·o·gy fli-ˈbä-lə-jē 
: a branch of medicine concerned with the veins
phlebologist
fli-ˈbä-lə-jist
noun plural phlebologists
… a phlebologist and medical director of the Vein Clinics of America in Kansas City, said his center could treat small and large varicose veins nonsurgically on an outpatient basis. 
James A. Fussell
James A. Fussell 
Word History
Etymology
International Scientific Vocabulary
First Known Use
circa 1839, in the meaning defined above
Medical Definition
phlebology
noun
phle·bol·o·gy fli-ˈbäl-ə-jē
plural phlebologies
: a branch of medicine concerned with the veins