Underdosing of other synthetic narcotics, initial encounter

This code signifies a patient's condition resulting from taking less than the prescribed or recommended amount of a synthetic narcotic, excluding methadone or other specified opioids. This underdosing can lead to the return or worsening of the condition the medication was intended to treat, or the development of withdrawal symptoms.

Use this code when a patient presents with symptoms or a worsening of their underlying condition due to insufficient intake of a synthetic narcotic. This applies to the initial encounter for this specific underdosing event, such as when the patient first seeks medical attention for the consequences of not taking enough medication.

• Always sequence this code after the code(s) for the specific condition being treated that has worsened or recurred due to the underdosing.
• Distinguish this from poisoning or adverse effects, which involve taking too much or having an unintended reaction to the correct dose.
• Ensure the documentation clearly specifies "underdosing" and identifies the drug as an "other synthetic narcotic."