Underdosing of MAO inhib antidepressants, init

This code indicates that a patient has not received enough of their prescribed monoamine oxidase inhibitor (MAOI) antidepressant medication. This underdosing could be due to various reasons, leading to inadequate therapeutic effect or worsening of the patient's underlying condition.

Use this code when a patient presents with symptoms related to insufficient MAOI antidepressant levels, or when a clinician identifies that the patient has not been taking their MAOI as prescribed. This applies to the initial visit where the underdosing is first identified or treated.

• Always use an additional code to identify the specific MAOI antidepressant involved (e.g., from categories T36-T50).
• Reserve the "A" seventh character for the very first encounter related to this specific underdosing event.
• Distinguish underdosing from noncompliance (Z91.12- for intentional underdosing, Z91.13- for unintentional).