J22 Unspecified acute lower respiratory infection

Billable ICD-10-CM code, FY2026.

Applicable to

• Acute (lower) respiratory (tract) infection NOS

Excludes1 (never code together)

• upper respiratory infection (acute) (J06.9)

Applies from J22 Unspecified acute lower respiratory infection

Applicable to

• Acute (lower) respiratory (tract) infection NOS

Excludes1 (never code together)

• upper respiratory infection (acute) (J06.9)

MS-DRG index

Defines the logic of DRG(s) 205-206 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 519.8 Other diseases of respiratory system, not elsewhere classified (approximate)

Code annotations containing back-references to J22

Back-references to J22

• Code Also: D81.82 Activated Phosphoinositide 3-kinase Delta Syndrome [APDS] ("other acute respiratory tract infections (J00-J06; J20-J22)")
• Type 1 Excludes: J06 Acute upper respiratory infections of multiple and unspecified sites ("acute respiratory infection NOS (J22)")
• Type 1 Excludes: J39 Other diseases of upper respiratory tract ("acute respiratory infection NOS (J22)")

Back-references to J22

• Code Also: D81.82 Activated Phosphoinositide 3-kinase Delta Syndrome [APDS] ("other acute respiratory tract infections (J00-J06; J20-J22)")
• Type 1 Excludes: J06 Acute upper respiratory infections of multiple and unspecified sites ("acute respiratory infection NOS (J22)")
• Type 1 Excludes: J39 Other diseases of upper respiratory tract ("acute respiratory infection NOS (J22)")

Diagnosis Index entries for J22

• Infection, infected, infective (opportunistic) › chest
• Infection, infected, infective (opportunistic) › respiratory (tract) NEC › acute
• Infection, infected, infective (opportunistic) › respiratory (tract) NEC › lower (acute)

Nearby codes

• J22 Unspecified acute lower respiratory infection (this code)