Underdosing of rifampicins, subsequent encounter

This code indicates that a patient has experienced an adverse effect due to receiving a lower-than-prescribed dose of a rifamycin-class antibiotic, such as rifampin. This underdosing occurred during a subsequent encounter for care, meaning the initial treatment for the underdosing or its consequences has already taken place.

Use this code when documenting ongoing management or follow-up for a patient who previously experienced underdosing of a rifamycin. This could include monitoring for treatment failure, managing persistent infection due to insufficient antibiotic levels, or addressing complications arising from the inadequate dosage. It signifies that the patient is still under active care related to the underdosing event.

• Always assign an additional code for the specific adverse effect or condition resulting from the underdosing (e.g., persistent infection).
• Ensure the documentation clearly supports that this is a subsequent encounter, not the initial treatment for the underdosing.
• Distinguish from poisoning (overdosing) or adverse effects from correct dosage, which use different code categories.