Chapter 17

Q00–Q99: Congenital Malformations, Deformations and Chromosomal Abnormalities

Congenital Malformations, Deformations and Chromosomal Abnormalities diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)
Internal Codes
  • Q75.001|

    Craniosynostosis, unspecified type, unilateral

  • Q75.002|

    Craniosynostosis, unspecified type, bilateral

  • Q75.009|

    Craniosynostosis, unspecified

  • Q75.01|

    Sagittal craniosynostosis

  • Q75.021|

    Coronal craniosynostosis, unilateral

  • Q75.022|

    Coronal craniosynostosis, bilateral

  • Q75.029|

    Coronal craniosynostosis, unspecified

  • Q75.03|

    Metopic craniosynostosis

  • Q75.041|

    Lambdoid craniosynostosis, unilateral

  • Q75.042|

    Lambdoid craniosynostosis, bilateral

  • Q75.049|

    Lambdoid craniosynostosis, unspecified

  • Q75.051|

    Cloverleaf skull

  • Q75.052|

    Pansynostosis

  • 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

  • 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

  • Q76.0|

    Spina bifida occulta

  • Q76.1|

    Klippel-Feil syndrome

  • Q76.2|

    Congenital spondylolisthesis

  • Q76.3|

    Congenital scoliosis due to congenital bony malformation

  • Q76.411|

    Congenital kyphosis, occipito-atlanto-axial region

  • Q76.412|

    Congenital kyphosis, cervical region

  • Q76.413|

    Congenital kyphosis, cervicothoracic region

  • Q76.414|

    Congenital kyphosis, thoracic region

  • Q76.415|

    Congenital kyphosis, thoracolumbar region

  • Q76.419|

    Congenital kyphosis, unspecified region

  • Q76.425|

    Congenital lordosis, thoracolumbar region

  • Q76.426|

    Congenital lordosis, lumbar region

  • Q76.427|

    Congenital lordosis, lumbosacral region

  • Q76.428|

    Congenital lordosis, sacral and sacrococcygeal region

  • Q76.429|

    Congenital lordosis, unspecified region

  • Q76.49|

    Other congenital malformations of spine, not associated with scoliosis

  • Q76.5|

    Cervical rib

  • Q76.6|

    Other congenital malformations of ribs

  • Q76.7|

    Congenital malformation of sternum

  • Q76.8|

    Other congenital malformations of bony thorax

  • Q76.9|

    Congenital malformation of bony thorax, unspecified

  • Q77.0|

    Achondrogenesis

  • Q77.1|

    Thanatophoric short stature

  • Q77.2|

    Short rib syndrome

  • Q77.3|

    Chondrodysplasia punctata

  • Q77.4|

    Achondroplasia

  • Q77.5|

    Diastrophic dysplasia

  • Q77.6|

    Chondroectodermal dysplasia

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