Q33.6 Congenital hypoplasia and dysplasia of lung

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis. Exempt from present-on-admission (POA) reporting.

Excludes1 (never code together)

• pulmonary hypoplasia associated with short gestation (P28.0)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 748.5 Agenesis, hypoplasia, and dysplasia of lung (approximate)

Code annotations containing back-references to Q33.6

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 Q33.6

• Development › imperfect, congenital › lungs
• Dysplasia › lung, congenital (not associated with short gestation)
• Hypoplasia, hypoplastic › lung (lobe) (not associated with short gestation)
• Hypoplasia, hypoplastic › pulmonary (not associated with short gestation)
• Inadequate, inadequacy › development › lungs
• Undeveloped, undevelopment › lung

Nearby codes

• Q33.1 Accessory lobe of lung
• 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 (this code)
• Q33.8 Other congenital malformations of lung
• Q33.9 Congenital malformation of lung, unspecified