I work in physician coding for specialty practices (Neurology, Rheumatology, etc.). I’ve only been coding for about 6 months now and a few days ago we were discussing comorbid conditions and when to code/not code them. Does anyone have any insight for me or documented instructions when to code comorbid conditions in ICD-10 coding? I’m specifically looking for whether or not the physician has to actually addresss the conditions or if they can be taken from the HPI or past medical history, etc., and coded after the primary/secondary diagnoses? Thanks for your help!