Underdosing of crbnc-anhydr inhibtr, benzo/oth diuretc, subs

This code indicates that a patient is experiencing adverse effects or a lack of therapeutic response due to taking less than the prescribed dose of a carbonic-anhydrase inhibitor, benzothiadiazide, or other diuretic. This underdosing is being addressed during a follow-up visit for the condition it is impacting.

Apply this code when a patient presents for a subsequent encounter, and documentation clearly states that their current medical issue (e.g., uncontrolled hypertension, persistent edema) is attributed to not taking enough of their prescribed diuretic medication. This is appropriate when the physician is managing the consequences of the underdosing.

• Always ensure documentation specifies "underdosing" and not simply noncompliance without adverse effects.
• Remember the 7th character "D" signifies a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Code first the condition for which the diuretic is prescribed, followed by this underdosing code.