What must a coder include when underdosing of insulin occurs due to mechanical failure?

When underdosing of insulin occurs due to mechanical failure, the coder must include the specific code for the mechanical complication. This requirement is in place because documenting the underlying cause of the underdosing—such as a malfunctioning insulin pump or syringe—is essential for accurate coding and reimbursement. It reflects the complexity of the patient's circumstances and helps to provide a clearer picture of their health situation.

By using the specific code for the mechanical complication, the coder ensures that the health care provider is adequately compensated for the additional care required due to this issue. It also helps in tracking and understanding patterns related to mechanical failures in insulin delivery systems, which is significant for both clinical and billing purposes. Therefore, including this specific code provides the necessary context that directly impacts patient care and medical billing accuracy.