Underdosing of antiasthmatics, sequela

This code indicates a patient's condition resulting from taking less than the prescribed or recommended dose of an antiasthmatic medication. The "sequela" designation signifies that the underdosing event occurred in the past and is now causing a current health problem or complication. This could manifest as worsening asthma symptoms, an asthma exacerbation, or other related adverse effects.

Use this code when documenting a current medical condition that is a direct consequence of a patient's historical underdosing of antiasthmatic medication. This is appropriate for follow-up visits where the long-term effects of the underdosing are being managed, or when a new complication arises attributable to that past event. It should not be used for acute underdosing events that are still ongoing.

• Always assign an additional code for the specific asthma condition or other sequela that resulted from the underdosing.
• Ensure documentation clearly links the current condition to a past underdosing event, rather than an acute or ongoing one.
• Verify the "S" seventh character is appropriate for sequela, indicating the long-term effects of a past event.