Full Answer
As of October 2015, ICD-9 codes are no longer used for medical coding. Instead, use this equivalent ICD-10-CM code, which is an exact match to ICD-9 code 251:
Non-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
DRG Group #562-563 - Fx, sprian, strn and dislocation except femur, hip, pelvis and thigh with MCC.
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code M23.251 and a single ICD9 code, 717.43 is an approximate match for comparison and conversion purposes.