J20Acute bronchitis

J20 is the ICD-10-CM diagnosis code for acute bronchitis. It belongs to block J20-J22 (other acute lower respiratory infections) and chapter 10 (diseases of the respiratory system). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: J20.0 (due to Mycoplasma pneumoniae), J20.1 (due to Hemophilus influenzae), J20.2 (due to streptococcus), J20.3 (due to coxsackievirus), J20.4 (due to parainfluenza virus), J20.5 (due to respiratory syncytial virus), J20.6 (due to rhinovirus), J20.7 (due to echovirus) and 2 more.

Don't report J20 together with the conditions in its Excludes1 note: bronchitis NOS (J40) and tracheobronchitis NOS (J40).

The conditions in its Excludes2 note aren't part of J20, but may be coded alongside it if the patient has both: acute bronchitis with bronchiectasis (J47.0), acute bronchitis with chronic obstructive asthma (J44.0), acute bronchitis with chronic obstructive pulmonary disease (J44.0), allergic bronchitis NOS (J45.909) and 7 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.