HAES has invaded medical coding The International Statistical Classification of Diseases and Related Health Problems was recently updated from version ICD-9 to ICD-10.  For most diagnosis, you have to click through a bunch of extra things that "specify" the diagnosis.  Whenever it is true, I add "morbid obesity" to patients' diagnoses, and since updating to ICD-10, I have to specify why the patient is obese.  The options are "morbid obesity due to medications," "morbid obesity due to other cause" or "morbid obesity due to excess calories."  (Ding ding ding!)