Q34.9 Congenital malformation of respiratory system, unspecified

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

Applicable to

• Congenital absence of respiratory system
• Congenital anomaly of respiratory system NOS

Applies from Q34 Other congenital malformations of respiratory system

Excludes2 (not included here)

• congenital central alveolar hypoventilation syndrome (G47.35)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 748.9 Unspecified anomaly of respiratory system

Code annotations containing back-references to Q34.9

Back-references to Q34

• 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 Q34.9

• Absence (of) (organ or part) (complete or partial) › respiratory organ NOS
• Anomaly, anomalous (congenital) (unspecified type) › respiratory system
• Defect, defective › respiratory system, congenital
• Deformity › respiratory system (congenital)
• Development › incomplete › respiratory system
• Malformation (congenital) › respiratory system

Nearby codes

• Q34 Other congenital malformations of respiratory system
• Q34.0 Anomaly of pleura
• Q34.1 Congenital cyst of mediastinum
• Q34.8 Other specified congenital malformations of respiratory system
• Q34.9 Congenital malformation of respiratory system, unspecified (this code)