Other congenital malformations of bony thorax

This code represents various congenital structural anomalies of the bony thorax (ribs, sternum, and thoracic vertebrae) that are not specifically classified elsewhere. These malformations are present at birth and can affect the shape, number, or fusion of these bones. Examples include sternal clefts, rib agenesis, or other unspecified chest wall deformities.

Use this code when documentation specifies a congenital malformation of the bony thorax that does not have a more specific ICD-10-CM code. This is appropriate for conditions like congenital absence of a rib, sternal foramen, or other unclassified congenital chest wall defects. Documentation should clearly state the congenital nature and location of the malformation.

• Do not use this code for acquired chest wall deformities; those would be coded to the M-series.
• Always seek a more specific code if available (e.g., for pectus excavatum or carinatum, or specific vertebral anomalies).
• Ensure the documentation explicitly states "congenital" to support the use of a Q-code.