Wheezing

This code represents the abnormal whistling sound produced during breathing, typically heard on expiration, caused by narrowed or obstructed airways. It is a symptom, not a definitive diagnosis, indicating an underlying respiratory issue.

Use this code when wheezing is documented as a presenting symptom without a definitive diagnosis of asthma or other specific respiratory conditions. It is appropriate when the cause of the wheezing is undetermined or when the patient is being evaluated for the symptom.

• Do not code this if asthma (J45.-) is also documented, as per the Excludes1 note.
• Always seek to code the underlying cause of the wheezing if known and documented.
• This code is often used as a primary diagnosis for initial evaluations or when the definitive diagnosis is pending.