Underdosing of rifampicins, sequela

This code signifies a patient's long-term health problem or condition that has arisen as a direct consequence of not receiving enough rifampicin, a common antibiotic, over a period of time. This underdosing has led to a lasting adverse effect on the patient's health, rather than an acute event.

This code is appropriate when documenting a chronic or persistent condition that is a direct result of inadequate rifampicin dosage. Examples include the development of drug-resistant tuberculosis due to insufficient treatment, or the progression of a mycobacterial infection because the prescribed rifampicin regimen was not followed or was ineffective.

• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., drug-resistant tuberculosis).
• Ensure documentation clearly links the current sequela to the historical underdosing of rifampicin.
• Distinguish from acute adverse effects of rifampicin, which would use different codes.