The patient is having a cesarean delivery and the DX is HELLP syndrome and also states cocaine use. Our question is what to use as the dx code for the cocaine use? One person in the office believes it is 648.33 and 304.2. However, I'm not sure because I thought 648.3_ was for drug usage that was prescribed to the patient and not for drugs that they are using without a prescription. Can anyone please help us?