Underdosing of antimycobacterial drugs, sequela

This code indicates a long-term consequence or complication arising from the patient's prior underdosing of antimycobacterial medications. It signifies that the underdosing event itself is no longer an active problem, but its lasting effects are currently being managed.

Apply this code when a patient presents with a condition directly attributable to a past instance of insufficient antimycobacterial drug intake. This includes scenarios like the recurrence or progression of tuberculosis due to inadequate prior treatment, or the development of drug resistance as a result of underdosing.

• This "S" seventh character indicates a sequela, meaning the residual effect of a past condition.
• Always code the specific condition or complication resulting from the underdosing first, followed by this code.
• Ensure documentation clearly links the current condition to a historical underdosing event of antimycobacterial drugs.