Underdosing of fluoroquinolone antibiotics, subs

This code indicates that a patient is experiencing the effects of receiving an insufficient dose of a fluoroquinolone antibiotic during a follow-up encounter. This could manifest as persistent infection, worsening symptoms, or a lack of expected therapeutic response due to the underdosing.

Apply this code when documenting a patient's ongoing care for an infection where the initial or continued fluoroquinolone antibiotic regimen was inadequate. This is appropriate for situations where the patient is returning for evaluation or treatment adjustments related to the underdosing.

• Ensure documentation clearly states the underdosing of a fluoroquinolone and that this is a subsequent encounter.
• Pair this code with a code for the underlying infection that is being inadequately treated.
• Distinguish from initial encounters (A) or sequela (S) by verifying the "D" seventh character for subsequent care.