If you are looking to create a family medical history, the first step is to talk to your family members. This includes parents, grandparents, siblings, aunts and uncles, cousins, and children. Get pertinent medical information from each of these individuals, but remember that not everyone remembers everything. That is why it is a good idea to request medical records to create an accurate family medical history. So no, you do not need to obtain medical records to do this, but if you want the most accurate information possible, it is a good idea to get medical records when creating a family medical history.