Underdosing of ganglionic blocking drugs, sequela

This code indicates that a patient is experiencing a long-term effect or complication due to not receiving enough of a ganglionic blocking drug. These medications are typically used to treat conditions like hypertension or autonomic neuropathies. The underdosing has led to a persistent health problem that is a direct result of the insufficient medication.

Use this code when a patient presents with a chronic condition or lasting adverse effect that is documented as a sequela of inadequate administration or intake of a ganglionic blocking agent. This applies when the original underdosing event is no longer active, but its consequences are still being treated. Examples include persistent uncontrolled hypertension or severe autonomic dysfunction directly attributed to past underdosing.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a previous underdosing.
• Always sequence this code after the code(s) for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a past underdosing of a ganglionic blocking drug.