Adverse effect of antimycobacterial drugs, sequela

This code signifies a long-term or residual condition resulting from a past adverse reaction to antimycobacterial medications. It indicates that the patient is no longer experiencing the acute adverse effect, but rather a lasting consequence or complication.

Apply this code when documenting a chronic or permanent health problem that is a direct result of a previous adverse effect from drugs used to treat mycobacterial infections (e.g., tuberculosis, leprosy). This would include conditions like permanent hearing loss following ototoxicity from streptomycin, or chronic liver damage from isoniazid.

• Always sequence this code after the code for the specific sequela (e.g., H91.01 for ototoxic hearing loss).
• Ensure documentation clearly links the current condition to a past adverse drug effect from an antimycobacterial agent.
• Do not use this code for acute adverse effects; those require codes from the T36-T50 range with an appropriate 5th or 6th character for initial or subsequent encounter.