Social Security rulings are based upon medical evidence. Generally, the decision is based solely upon what is in a claimant’s medical records. The Social Security Administration looks almost exclusively at the medical evidence in making a decision. Each type of disability (such as heart disease, diabetes, blindness) has their own set of rules for decision making and each category of impairments needs a specific diagnostic test that demonstrates the severity of your condition. For instance, the condition of congestive heart failure may be proven by a chest x-ray, echocardiography (M-Mode, 2-dimensional, and Doppler), radionuclide studies, or cardiac catheterization. The Administration will pay to have a chest x-ray done, but these rarely prove the existence of the condition. The best tests are also the most expensive. Some claimants have the ability to get the tests done through their doctor. However, in some cases, it is wise to engage the assistance of an experience Social Security lawyer who has the ability to get low cost testing done to help prove your case.