Q75.4 Mandibulofacial dysostosis

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

Applicable to

• Franceschetti syndrome
• Treacher Collins syndrome

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)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 756.0 Anomalies of skull and face bones (approximate)

Code annotations containing back-references to Q75.4

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 Q75.4

• Dysostosis › mandibulofacial (incomplete)
• Franceschetti-Klein (-Wildervanck) disease or syndrome
• Syndrome › Franceschetti
• Syndrome › mandibulofacial dysostosis
• Syndrome › Treacher Collins
• Treacher Collins syndrome

Nearby codes

• Q75.058 Other multi-suture craniosynostosis
• Q75.08 Other single-suture craniosynostosis
• Q75.1 Craniofacial dysostosis
• Q75.2 Hypertelorism
• Q75.3 Macrocephaly
• Q75.4 Mandibulofacial dysostosis (this code)
• Q75.5 Oculomandibular dysostosis
• Q75.8 Other specified congenital malformations of skull and face bones
• Q75.9 Congenital malformation of skull and face bones, unspecified