ICD 10 is a medical coding reference that the medical world is supposed to use for identifying and classifying diseases. It codes for diseases, signs and symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or diseases.

DMD in this list of diseases is classified under Primary disorders of muscles G71.0

ICD 10 for DMD

Over here Duchenne is clubbed with 

• Autosomal recessive, childhood type, muscular dystrophy resembling Duchenne or Becker muscular dystrophy
• Benign [Becker] muscular dystrophy
• Benign scapuloperoneal muscular dystrophy with early contractures [Emery-Dreifuss]
• Congenital muscular dystrophy NOS
• Congenital muscular dystrophy with specific morphological abnormalities of the muscle fiber
• Distal muscular dystrophy
• Facioscapulohumeral muscular dystrophy
• Limb-girdle muscular dystrophy
• Ocular muscular dystrophy
• Oculopharyngeal muscular dystrophy
• Scapuloperoneal muscular dystrophy
• Severe [Duchenne] muscular dystrophy

This means that from a data gathering perspective there is no way to distinguish Duchenne from other muscle disorders. There are links on the above 

Is this what we should be also focussing on. If the raw data in the system does not allow isolation of Duchenne I think there will be a lot you confusion in the decision making process. We all know that even within Duchenne there is a host of variations which influence the cure. Why not have a dedicate code for Duchenne so that Hospitals and Clinics are not messing up the data by mixing everything related to muscle disorders into one single code.

PS: There is even confusion on the name. Are we looking that few years down the line there will be no DMD but SMD (Severe muscular dystrophy)