Underdosing of other psychostimulants, initial encounter

This code signifies a patient experiencing adverse effects or complications due to taking less than the prescribed or recommended amount of a psychostimulant medication, excluding methylphenidate and amphetamines. This underdosing can lead to a return of symptoms the medication was intended to treat or a worsening of the underlying condition.

Use this code when documenting a patient presenting with symptoms related to insufficient intake of psychostimulants like modafinil, armodafinil, or other unspecified psychostimulants. This applies to initial evaluations or treatments for the underdosing event itself.

• Ensure the documentation clearly specifies "underdosing" and identifies the substance as a psychostimulant other than methylphenidate or amphetamine.
• Always assign an additional code for the specific manifestation or adverse effect of the underdosing.
• The "A" seventh character indicates an initial encounter for the underdosing event.