Adverse effect of unsp hormone antagonists, init encntr

This code signifies an undesirable or harmful reaction experienced by a patient due to the therapeutic use of a hormone antagonist, where the specific type of antagonist is not documented. This reaction occurred during the initial phase of treatment or exposure.

Apply this code when a patient presents with symptoms or conditions directly attributable to an unknown hormone antagonist, and it's the first time they are being seen for this particular adverse event. This is appropriate when the medical record clearly indicates an adverse effect but lacks specificity regarding the drug.

• Always attempt to identify the specific hormone antagonist for a more precise code (e.g., T38.8X5A for adverse effect of other hormone antagonists).
• Use a secondary code to describe the specific manifestation of the adverse effect (e.g., rash, nausea, liver damage).
• Ensure the documentation explicitly states "adverse effect" rather than poisoning, underdosing, or therapeutic use without adverse effect.