Underdosing of tetracyclines, subsequent encounter

This code indicates that a patient is experiencing adverse effects or complications due to taking less than the prescribed amount of a tetracycline antibiotic. This underdosing is occurring during a follow-up visit for the initial underdosing event or its sequelae.

Use this code when a patient presents for ongoing management of an infection that is not resolving due to insufficient tetracycline intake, or for complications directly attributable to the underdosing. This applies to situations where the patient is still under active treatment for the underdosing event.

• Always sequence this code after the primary diagnosis indicating the condition being treated or the complication of the underdosing.
• Ensure documentation clearly states "underdosing" and specifies the drug class as "tetracyclines."
• The "D" seventh character signifies a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.