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.
Chapter 4: Blood Vessels and Aging: The Rest of the Journey. A man is as old as his arteries.. Thomas Sydenham, MD, English Physician, 1624-1689. Stretched end-to-end, the arteries, veins, and other vessels of the human circulatory system would measure about 60,000 miles.On any given day, the heart pumps about 1,800 gallons of blood through this vast network.he more severe the effects of aging are on the blood vessels, the easier it is for atherosclerosis, hypertension, and other processes to do damage and, in turn, have an effect on the rate of aging in the vessels. Smoking, lack of exercise, a poor diet, and obesity also can exacerbate these effects.