Q33.1 Accessory lobe of lung

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applicable to

• Azygos lobe (fissured), lung

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 748.69 Other congenital anomalies of lung (approximate)

Code annotations containing back-references to Q33.1

Back-references to Q33

• Code Also: P28 Other respiratory conditions originating in the perinatal period (", if applicable, congenital malformations of the respiratory system (Q30-Q34)")

Diagnosis Index entries for Q33.1

• Accessory (congenital) › lung (lobe)
• Azygos › lobe (lung)

Nearby codes

• Q33 Congenital malformations of lung
• Q33.0 Congenital cystic lung
• Q33.1 Accessory lobe of lung (this code)
• Q33.2 Sequestration of lung
• Q33.3 Agenesis of lung
• Q33.4 Congenital bronchiectasis
• Q33.5 Ectopic tissue in lung
• Q33.6 Congenital hypoplasia and dysplasia of lung