J20.9 Acute bronchitis, unspecified

Billable ICD-10-CM code, FY2026.

Applies from J20 Acute bronchitis

Includes

• acute and subacute bronchitis (with) bronchospasm
• acute and subacute bronchitis (with) tracheitis
• acute and subacute bronchitis (with) tracheobronchitis, acute
• acute and subacute fibrinous bronchitis
• acute and subacute membranous bronchitis
• acute and subacute purulent bronchitis
• acute and subacute septic bronchitis

Excludes1 (never code together)

• bronchitis NOS (J40)
• tracheobronchitis NOS (J40)

Excludes2 (not included here)

• 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)
• bronchitis due to chemicals, fumes and vapors (J68.0)
• chronic bronchitis NOS (J42)
• chronic mucopurulent bronchitis (J41.1)
• chronic obstructive bronchitis (J44.-)
• chronic obstructive tracheobronchitis (J44.-)
• chronic simple bronchitis (J41.0)
• chronic tracheobronchitis (J42)

MS-DRG index

Defines the logic of DRG(s) 202-203 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 466.0 Acute bronchitis (approximate)

Code annotations containing back-references to J20.9

Back-references to J20

• Code Also: D81.82 Activated Phosphoinositide 3-kinase Delta Syndrome [APDS] ("other acute respiratory tract infections (J00-J06; J20-J22)")
• Type 1 Excludes: J40 Bronchitis, not specified as acute or chronic ("acute bronchitis (J20.-)")
• Type 1 Excludes: J98.01 Acute bronchospasm ("acute bronchitis with bronchospasm (J20.-)")

Diagnosis Index entries for J20.9

• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › with › tracheitis (l5 years of age and above) › acute or subacute
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › with › tracheitis (l5 years of age and above) › under l5 years of age
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › acute or subacute (with bronchospasm or obstruction)
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › catarrhal (l5 years of age and above) › under l5 years of age
• Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous) › mucopurulent (chronic) (recurrent) › acute or subacute
• Bronchorrhea › acute
• Croup, croupous (catarrhal) (infectious) (inflammatory) (nondiphtheritic) › bronchial
• Tracheitis (catarrhal) (infantile) (membranous) (plastic) (septal) (suppurative) (viral) › with › bronchitis (15 years of age and above) › under 15 years of age

Nearby codes

• J20.4 Acute bronchitis due to parainfluenza virus
• J20.5 Acute bronchitis due to respiratory syncytial virus
• J20.6 Acute bronchitis due to rhinovirus
• J20.7 Acute bronchitis due to echovirus
• J20.8 Acute bronchitis due to other specified organisms
• J20.9 Acute bronchitis, unspecified (this code)