Q75.049 Lambdoid craniosynostosis, unspecified

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

Applies from Q75 Other congenital malformations of skull and face bones

Excludes1 (never code together)

• congenital malformation of face NOS (Q18.-)
• congenital malformation syndromes classified to Q87.-
• dentofacial anomalies [including malocclusion] (M26.-)
• musculoskeletal deformities of head and face (Q67.0-Q67.4)
• skull defects associated with congenital anomalies of brain such as:
• anencephaly (Q00.0)
• encephalocele (Q01.-)
• hydrocephalus (Q03.-)
• microcephaly (Q02)

Applies from Q75.04 Lambdoid craniosynostosis

Applicable to

• Non-deformational posterior plagiocephaly

Excludes1 (never code together)

• dolichocephaly (Q67.2)

MS-DRG index

Defines the logic of DRG(s) 564-566 in MDC 08.

Code annotations containing back-references to Q75.049

Back-references to Q75.04

• Type 1 Excludes: Q67.3 Plagiocephaly ("lambdoid craniosynostosis (Q75.04-)")

Back-references to Q75

• Type 1 Excludes: M24.3 Pathological dislocation of joint, not elsewhere classified ("congenital dislocation or displacement of joint- see congenital malformations and deformations of the musculoskeletal system (Q65-Q79)")
• Type 2 Excludes: M95 Other acquired deformities of musculoskeletal system and connective tissue ("congenital malformations and deformations of the musculoskeletal system (Q65-Q79)")
• Type 1 Excludes: Q18 Other congenital malformations of face and neck ("congenital malformations of skull and face bones (Q75.-)")

Diagnosis Index entries for Q75.049

• Craniosynostosis › lambdoid

Nearby codes

• Q75.029 Coronal craniosynostosis, unspecified
• Q75.03 Metopic craniosynostosis
• Q75.04 Lambdoid craniosynostosis
• Q75.041 Lambdoid craniosynostosis, unilateral
• Q75.042 Lambdoid craniosynostosis, bilateral
• Q75.049 Lambdoid craniosynostosis, unspecified (this code)
• Q75.05 Multi-suture craniosynostosis
• Q75.051 Cloverleaf skull
• Q75.052 Pansynostosis
• Q75.058 Other multi-suture craniosynostosis
• Q75.08 Other single-suture craniosynostosis