Underdosing of chloramphenicol group, initial encounter

This code signifies that a patient has received an insufficient amount of medication from the chloramphenicol antibiotic group, leading to a suboptimal therapeutic effect. This underdosing can result in persistent or worsening infection due to inadequate drug levels.

Apply this code when documentation indicates a patient was prescribed a chloramphenicol-group antibiotic but did not take or receive the full prescribed dose, and this is the initial encounter for this specific underdosing event. This would include situations where a patient self-reduced their dose or a healthcare provider inadvertently administered too little.

• Always sequence this T-code after the code(s) for the condition being treated by the chloramphenicol.
• The "A" in the 7th character indicates an initial encounter, meaning the patient is actively receiving care for the underdosing.
• Ensure the medical record clearly specifies a chloramphenicol-group antibiotic was involved.