Several factors make a screening, test, procedure or doctors’ office visit preventive and covered at 100 percent. First, the test, procedure or visit is widely accepted by the medical community as effective in preventing disease. Second, the patient fits within the gender, age or other demographic parameters of the preventive care recommendation. Finally, the bill is coded by the doctor’s office and processed by the insurance company correctly. It is important to note that all three should happen to fall under the preventive care label.