Underdosing of other narcotics, subsequent encounter

This code indicates that a patient is experiencing adverse effects or complications due to taking less than the prescribed or recommended dose of a narcotic substance other than opium, heroin, or other specified opioids. This underdosing is not the initial event but rather a follow-up encounter for ongoing management or assessment of the consequences.

Use this code when a patient presents for treatment of symptoms directly related to insufficient intake of a narcotic medication (e.g., inadequate pain control, withdrawal symptoms) and it is not their first visit for this specific underdosing episode. This applies to situations where the patient intentionally or unintentionally took less than prescribed.

• Always sequence this code after the code(s) for the specific adverse effect or complication being treated.
• Ensure the documentation clearly specifies "underdosing" and identifies the substance as a "narcotic" (other than those with more specific codes).
• Confirm the encounter is for follow-up care, not the initial presentation, to justify the "D" seventh character.