Underdosing of anticholinesterase agents, sequela

This code signifies a long-term consequence or complication arising from the patient not receiving enough of an anticholinesterase medication. This underdosing could have occurred in the past and is now manifesting with persistent symptoms or conditions.

Use this code when documenting a current condition that is a direct and lasting result of a previous period of insufficient anticholinesterase agent administration. Examples include chronic muscle weakness or cognitive decline directly attributed to historical underdosing of medications for conditions like myasthenia gravis or Alzheimer's disease.

• Requires a seventh character "S" to indicate sequela, meaning the residual effect of a past underdosing event.
• Always sequence this code after the code(s) for the specific sequela (e.g., muscle weakness, cognitive impairment).
• Ensure documentation clearly links the current condition to the prior underdosing of an anticholinesterase agent.