Congenital deformity of sternocleidomastoid muscle

This code represents a birth defect affecting the sternocleidomastoid muscle, typically presenting as a palpable mass or torticollis (a twisted neck). This congenital condition restricts neck movement and can lead to head tilting.

Use this code for documented cases of congenital muscular torticollis or a congenital mass within the sternocleidomastoid muscle. Documentation should clearly state the congenital nature of the deformity.

• Differentiate from acquired torticollis, which has different coding.
• Look for terms like "congenital torticollis," "sternocleidomastoid tumor of infancy," or "fibromatosis colli."
• Consider additional codes for associated conditions, such as plagiocephaly, if documented.