Underdosing of immunoglobulin, subsequent encounter

This code signifies that a patient is experiencing adverse effects or complications due to receiving an insufficient dose of immunoglobulin. This underdosing can lead to a recurrence or worsening of the underlying condition that the immunoglobulin therapy was intended to treat.

Apply this code when documentation indicates a patient is presenting for follow-up care, monitoring, or treatment of issues directly attributable to an inadequate administration of immunoglobulin. This typically occurs after the initial underdosing event has been identified.

• Always sequence this code after the primary diagnosis for the condition being treated with immunoglobulin.
• Ensure documentation clearly links the patient's current symptoms or condition to the previously identified underdosing.
• Verify that the encounter is for a subsequent visit related to the underdosing, not the initial event.