ICD-10 diagnosis codes are extremely important to MSF for a variety of reasons. We continue to receive bills with incomplete codes.  ICD-10 codes are 3-7 characters (alpha and numeric).  Some codes require a 6^th or 7^th character in order to be complete.   Codes that require additional characters in order to be complete are indicated in the ICD-10 manual with a check mark inside a red box.  Make sure when submitting your bills that the complete ICD-10 code has been chosen.