Lyme disease begins with a simple bite from an infected tick. What was a bite becomes a rash, and the rash can precede serious nerve or heart problems or arthritis. However, as is the case with many illnesses, it can be caught with the right test. Led by Dr. Ronald DeGarmo, the staff of doctors and nurses at On Call performs detailed medical tests for many illnesses and disorders. Additionally, they identify early pregnancies, test DNA, and perform thorough body-composition analyses, which can help patients lose weight or confirm that they still have two arms.