Mary Melin, an Associate of Science Medical Assisting graduate from Keiser University, returned to the classroom to conduct a lecture  about Medical Billing.   She informed the class  about the change from ICD-9 (International Classification of Diseases) to ICD-10 . She also spoke about CPT-(Current Procedures Terminology) as well as the different type of insurances.  Medical Assistants are responsible to make sure that the diagnosis matches the ICD-10 codes in order for the insurance companies to pay out the correct amounts for the services billed.