Underdosing of antimycobacterial drugs, subsequent encounter

This code indicates that a patient is experiencing the effects of taking less than the prescribed amount of medication intended to treat mycobacterial infections, such as tuberculosis or leprosy. This underdosing is occurring during a follow-up visit for care related to the initial underdosing event.

Use this code when documenting a patient's return visit for ongoing management or complications stemming from previously identified insufficient intake of antimycobacterial drugs. This applies to situations where the patient is still under active treatment or monitoring for the consequences of the underdosing.

• Requires an additional code to specify the specific antimycobacterial drug involved (e.g., from categories T36-T50).
• Always sequence this code after the primary diagnosis for the condition being treated (e.g., tuberculosis).
• The 7th character "D" signifies a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.