Our Services CIS provides a full range of cardiovascular care, from prevention to diagnostics and treatment. Offering 24/7 virtual care, outpatient procedures, in-clinic vein treatments, care management and so much more, CIS is your premier cardiology provider. Leg & Vein Treatments Outpatient Procedures 24/7 Virtual Care Research Trials Keep Up with All Things CIS About CIS Find a Physician Leg & Vein Center Who We Are: A Team of 63 Cardiologists Across 23 Locations The CIS mission is to provide our patients with the highest-quality cardiovascular care available. With 23 locations and 63 cardiologists, our team continues to lead in the development of new techniques and technologies for treating both coronary and peripheral diseases. Meet CIS Testimonials Leg & Vein Center The Leg & Vein Center at Cardiovascular Institute of the South diagnoses and treats cardiovascular conditions in the legs, such as peripheral artery disease and vein disease. Our cardiologists are among the most-renowned venous disease specialists in the nation. Learn More