Undrdose of primarily systemic and hematolog agents, sequela

This code signifies a patient's adverse health condition resulting from the long-term or delayed effects of not taking enough of a systemic or hematological medication. It indicates that the underdosing event itself occurred in the past, but its consequences are still present or have manifested later. This category includes a broad range of medications affecting various body systems beyond the central nervous system.

Apply this code when a patient presents with a chronic or residual condition directly attributable to a past instance of insufficient dosing of medications like anticoagulants, immunosuppressants, or certain endocrine agents. This is appropriate when the underdosing is no longer actively occurring but has left a lasting impact. Examples include a patient with a thrombotic event due to past underdosing of an anticoagulant, or organ rejection due to historical underdosing of an immunosuppressant.

• Always sequence this code after the code for the specific condition or disease that resulted from the underdosing.
• Ensure documentation clearly links the current sequela to a past underdosing event of a systemic or hematological agent.
• Do not use this code for acute underdosing events or for underdosing of psychotropic medications.