A Global Genes resource: Since most rare diseases are caused by changes in your genes, genetic testing is often part of the journey. But understanding your options may be challenging. Partnering with a genetic counselor can help you make the best choice for you and your family. What is a Genetic Counselor? A genetic counselor is a healthcare professional with special training in counseling and medical genetics. They can help you understand the diagnostic process and can advocate for you to obtain emotional and financial support and get the best possible care.