Underdosing of unspecified systemic antibiotic, subs encntr

This code indicates that a patient is experiencing the effects of taking less than the prescribed or recommended dose of an unspecified systemic antibiotic. This underdosing is causing a current problem or complication, and the patient is receiving follow-up care for this issue.

Apply this code when a patient presents for ongoing management of a condition that has been complicated or exacerbated by insufficient intake of an antibiotic, and the specific antibiotic agent is not documented. Examples include a persistent infection due to inadequate antibiotic levels, or a relapse of an infection because the patient stopped taking the medication too soon.

• Requires a documented link between the underdosing and the patient's current clinical presentation.
• The "D" seventh character signifies a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always sequence this code after the code for the condition being treated or complicated by the underdosing.