Lambdoid craniosynostosis, unspecified

This code represents a congenital anomaly where the lambdoid suture of the skull prematurely fuses, leading to an abnormal head shape. This fusion restricts the growth of the posterior skull, potentially causing flattening on one or both sides of the back of the head. The "unspecified" nature indicates that the laterality (left or right) of the fusion is not documented.

Use this code when documentation confirms lambdoid craniosynostosis but does not specify whether it affects the left or right lambdoid suture. This diagnosis is typically made through physical examination and confirmed with imaging studies such as CT scans. Supporting documentation should clearly state the presence of lambdoid craniosynostosis without laterality.

• Do not use this code if the documentation specifies unilateral lambdoid craniosynostosis (e.g., left or right); instead, use the more specific codes Q75.041 or Q75.042.
• Ensure the medical record clearly distinguishes lambdoid craniosynostosis from other forms of craniosynostosis, such as sagittal or coronal.
• This code is for the diagnosis itself; any surgical correction would be coded separately with appropriate CPT codes.