Adverse effect of prim sys and hematolog agents, sequela

This code signifies a long-term or residual condition resulting from an adverse reaction to a medication primarily affecting systemic functions or blood components. It indicates that the acute adverse effect has resolved, but its lasting consequences persist.

Apply this code when a patient presents with a chronic health problem directly attributable to a past adverse drug event involving systemic or hematological agents. Examples include persistent organ damage, chronic blood dyscrasias, or neurological deficits that developed as a sequela of such a medication.

• Always use this code as a secondary diagnosis, following the code for the specific sequela.
• Ensure documentation clearly links the current condition to a past adverse effect of a systemic or hematological agent.
• Do not use this code for acute adverse effects; those require codes from the 'A' or 'D' categories for initial or subsequent encounters.