If the primary purpose of the annual visit is to address the status and management of the patient's chronic conditions, such that these are the primary diagnoses on the claim form, you should use the usual office visit codes (assuming the services are provided in the office).
When the blood vessels are this small they are called capillaries. There are more capillaries (and more miles of capillaries) than any other kind of blood vessel. To answer your question, there are approximately 60,000 miles of blood vessels in an adult human body. That's about 100,000 kilometers. And if you really did stretch out your vessels for 60,000 miles most of them would be capillary miles. Each capillary is very short, but there are so very many of them. I found the answer to your question in a college textbook of human anatomy and physiology.
The systemic circulation is a major portion of the circulatory system. The network of veins, arteries and blood vessels transports oxygenated blood from the heart, delivers oxygen and nutrients to the body's cells and then returns deoxygenated blood back to the heart.The system of blood vessels in the human body measure about 60,000 miles (96,560 kilometers).Arteries carry oxygen-rich blood from the heart through the body. Veins carry oxygen-poor blood back to the heart. The superior vena cava carries oxygen-poor blood into the heart.The aorta carries oxygenated blood from the heart to organs and tissues. Related 1  : Circulatory System: Facts, Function & Diseases.he system of blood vessels in the human body measure about 60,000 miles (96,560 kilometers). Arteries carry oxygen-rich blood from the heart through the body. Veins carry oxygen-poor blood back to the heart. The superior vena cava carries oxygen-poor blood into the heart.