Underdosing of other antihypertensive drugs, sequela

This code signifies a patient's underdosing of antihypertensive medications other than those specifically listed in T46.5X1-T46.5X5, resulting in a sequela. A sequela indicates a condition that is the late effect of an injury or illness, meaning the acute phase of the underdosing event has passed, but the patient continues to experience a residual problem directly attributable to it.

Use this code when documentation clearly links a current, chronic condition or complication to a past episode of insufficient intake of an "other" antihypertensive drug. This might include patients presenting with persistent, uncontrolled hypertension or organ damage (e.g., kidney damage, heart failure exacerbation) that the physician explicitly attributes to a historical, prolonged period of underdosing of their prescribed blood pressure medication.

• Ensure the medical record explicitly states a causal link between the underdosing and the current sequela.
• Verify the specific antihypertensive drug involved is not covered by more specific codes within T46.5X1-T46.5X5.
• This code is for the underdosing as the cause of the sequela, not the sequela itself. Code the specific sequela first.