Underdosing of antigonadtr/antiestr/antiandrg, NEC, init

This code indicates that a patient has experienced an adverse effect due to receiving less than the prescribed or recommended dose of medications that suppress gonadotropins, estrogens, or androgens, and the specific drug is not classified elsewhere. This underdosing event is the initial presentation or encounter for this particular adverse effect.

Use this code when a patient presents with symptoms or conditions directly attributable to insufficient dosing of hormone-modulating drugs like antiestrogens (e.g., tamoxifen), antiandrogens (e.g., flutamide), or antigonadotrophins. This is appropriate for the first time the underdosing and its resulting clinical impact are documented.

• Ensure documentation clearly states "underdosing" and specifies the type of hormone-modulating medication involved.
• Verify that this is the initial encounter for the underdosing event; subsequent encounters would use a different seventh character.
• Always code the specific manifestation of the underdosing (e.g., disease progression, recurrence of symptoms) as a primary diagnosis, with this code as a secondary diagnosis.