Have you ever been to a doctor or a hospital because you were not feeling well? When you visit a doctor or a therapist, they will ask you a lot of questions to understand what’s making you feel sick. The DSM-IV codes are like labels that doctors use to help them understand what might be wrong with you.
Let’s imagine you fell down and hurt your knee. Your doctor would examine you and ask you questions like, "Does it hurt when I touch it? How did you fall?" They write down important information so they can make a good diagnosis, which is like a fancy word for guessing what’s wrong. Once they figure it out, they will write it down using a code.
These codes make it easy for doctors to remember the problem and discuss it with other doctors. For example, if your doctor thinks that you have anxiety, he or she might write "Anxiety Disorder" with a code number like "300.2." That way, if they talk to another doctor about your care, they can say "Patient has an Anxiety Disorder 300.2" instead of saying everything related to that disorder.
These codes are also useful for insurance companies. They use them to pay doctors and hospitals for the care they gave you. They want to know what’s wrong with you before they pay, so they use the codes to help them understand what the doctor did to help you.
Overall, the DSM-IV Codes are just a system that helps doctors, hospitals and insurance companies keep track of what's happening to you and how to treat it.