Question: Which ICD-10 code should I use for medication management? Virginia Subscriber Answer: The short answer to your question is that there is currently no ICD-10-CM code for medication management. However, you can document this using two codes. You would begin with a code from the Z79.- (Long term (current) drug therapy) group, which allows you to document that your patient is taking one of a number of specific therapeutic drugs. Following the Code Also note that accompanies the Z79.- group, you would then use Z51.81 (Encounter for therapeutic drug level monitoring). Though this code does not specifically make mention of medication management, it does indicate that your pediatrician has assessed whether the level of a drug prescribed to a patient is having the desired therapeutic effect or whether the drug is affecting the patient adversely, which is, in essence, medication management.