Craniosynostosis, unspecified type, unilateral

This code describes a congenital malformation characterized by the premature fusion of one or more cranial sutures, specifically when the type of craniosynostosis is not specified and affects only one side of the skull. This early fusion restricts normal skull growth, leading to an abnormally shaped head and potential complications.

Use this code when documentation indicates a diagnosis of craniosynostosis without specifying the particular suture involved (e.g., sagittal, coronal, metopic) but clearly states it is unilateral. Supporting documentation would include imaging reports (CT scans, X-rays) confirming premature suture closure and physical examination findings of an asymmetrical skull shape.

• Ensure documentation explicitly states "unilateral" and that the specific type of craniosynostosis is not identified.
• If the specific suture involved is known (e.g., sagittal, coronal), a more specific code from the Q75.0- subcategory should be used.
• Do not use this code if the craniosynostosis is bilateral or if the laterality is not documented.