Underdosing of tetracyclic antidepressants, subs encntr

This code indicates that a patient is experiencing adverse effects or complications due to taking less than the prescribed dose of a tetracyclic antidepressant. This underdosing is occurring during a follow-up visit for the initial problem or for ongoing care related to the underdosing.

Use this code when a patient presents for continued management of symptoms or conditions arising from insufficient intake of a tetracyclic antidepressant. This is appropriate for situations where the underdosing is not a new problem but rather an ongoing issue being addressed in subsequent encounters.

• Ensure documentation clearly states "underdosing" and specifies a tetracyclic antidepressant.
• The "D" seventh character signifies a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always code the specific manifestation of the underdosing (e.g., recurrence of depression) as the primary diagnosis, with this code as a secondary diagnosis.