> Because these are world health organisation 'international disease classification' codes that are designed for population health study and happen to be used f

> Because these are world health organisation 'international disease classification' codes that are designed for population health study and happen to be used for insurance billing in the US. This is the root of the problem. These codes should not be used for billing. That should be much more coarse. They bill you for visiting the GP. They bill you for a surgery. Adding the codes to the records is fine and good, but really should just be an internal detail that isn't that relevant to the patient.