Underdosing of amphetamines, initial encounter

This code signifies that a patient is experiencing adverse effects or a worsening of their condition due to receiving less than the prescribed or therapeutically required dose of an amphetamine. This underdosing can lead to a return of symptoms or a lack of expected therapeutic response.

Apply this code when a patient presents with symptoms indicating their amphetamine medication is insufficient, and this is the first time the underdosing is being addressed or investigated. This includes situations where a patient self-reduced their dose, a prescription was filled incorrectly with a lower strength, or a prescribed dose is no longer effective due to changing patient needs.

• Always assign an additional code for the specific manifestation of the underdosing (e.g., return of ADHD symptoms, narcolepsy symptoms).
• Ensure documentation clearly states the underdosing as the cause of the patient's current presentation.
• The "A" seventh character indicates an initial encounter, meaning the patient is actively receiving treatment for the underdosing.