ICD-10 diagnostic codes will be required on all claims starting October 1, 2015. Visit the AASM online store and purchase your copy of the ICD-9-CM to ICD-10-CM Sleep Medicine Crosswalk to start your preparation for the transition to ICD-10. As clinicians and staff prepare, this crosswalk is an easy tool for assigning the most accurate code. It includes each diagnosis listed in the ICSD-3 along with its associated ICD-9-CM and ICD-10-CM code and code descriptor.