Underdosing of penicillins, sequela

This code signifies a patient's adverse health condition or complication that is a direct result of not receiving enough penicillin medication. This could be due to a patient not taking their prescribed dose, a prescription error leading to insufficient dosage, or issues with medication absorption, ultimately leading to a persistent or long-term problem.

Apply this code when documenting a chronic or residual condition that has developed because a patient did not receive an adequate amount of penicillin. This is appropriate for situations where the underdosing event itself is in the past, but its lasting effects are currently being treated or evaluated. For example, a patient presenting with persistent infection due to inadequate penicillin treatment weeks prior.

• This code is for the sequela (long-term effect) of underdosing, not the acute underdosing event itself.
• Always code the specific condition resulting from the underdosing first, followed by this sequela code.
• Ensure documentation clearly links the current condition to a past underdosing of penicillin.