Underdosing of pyrazolone derivatives, sequela

This code indicates a long-term consequence or complication arising from the patient not receiving enough of a pyrazolone derivative medication. This underdosing occurred in the past and is now causing a current health problem. Examples of pyrazolone derivatives include drugs like metamizole or propyphenazone, often used for pain or fever.

Assign this code when a patient presents with a condition that is a direct result of a previously insufficient dose of a pyrazolone derivative. This typically applies to chronic issues or permanent damage linked to the past underdosing. It should be used when the underdosing event itself is no longer acute, but its effects persist.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., chronic pain, organ damage).
• Ensure documentation clearly links the current condition to a past underdosing of a pyrazolone derivative.
• The "S" seventh character indicates a sequela, meaning the residual effects of the underdosing are being treated.