Below is an instruction from Human. Write a response.
    ### Instruction:
    What to do for Monogenic Forms of Diabetes: Neonatal Diabetes Mellitus and Maturity-onset Diabetes of the Young ?
    ### Response:
    - Mutations in single genes can cause rare forms of diabetes.  - Genetic testing can identify many forms of monogenic diabetes.  - A physician evaluates whether genetic testing is appropriate.  - A correct diagnosis aided by genetic testing can lead to optimal treatment.
    