Underdosing of methamphetamines, subsequent encounter

This code signifies that a patient is experiencing adverse effects or complications due to taking less methamphetamine than prescribed or intended, and this is occurring during a follow-up visit after initial treatment. It indicates a situation where the therapeutic or intended effect of the methamphetamine is not being achieved due to insufficient dosage.

Use this code for patients presenting for follow-up care related to a previous underdosing event of methamphetamine, such as persistent withdrawal symptoms, relapse of a condition being treated with methamphetamine, or continued lack of efficacy. This applies when the patient is seen after the initial treatment of the underdosing.

• Ensure documentation clearly states "underdosing" and specifies "methamphetamines."
• Verify that the encounter is a "subsequent encounter" following initial management of the underdosing.
• Always code any associated manifestations or complications of the underdosing.