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
  • Q66.32|

    Other congenital varus deformities of feet, left foot

  • Q66.40|

    Congenital talipes calcaneovalgus, unspecified foot

  • Q66.41|

    Congenital talipes calcaneovalgus, right foot

  • Q66.42|

    Congenital talipes calcaneovalgus, left foot

  • Q66.50|

    Congenital pes planus, unspecified foot

  • Q66.51|

    Congenital pes planus, right foot

  • Q66.52|

    Congenital pes planus, left foot

  • Q66.6|

    Other congenital valgus deformities of feet

  • Q66.70|

    Congenital pes cavus, unspecified foot

  • Q66.71|

    Congenital pes cavus, right foot

  • Q66.72|

    Congenital pes cavus, left foot

  • Q66.80|

    Congenital vertical talus deformity, unspecified foot

  • Q66.81|

    Congenital vertical talus deformity, right foot

  • Q66.82|

    Congenital vertical talus deformity, left foot

  • Q66.89|

    Other specified congenital deformities of feet

  • Q66.90|

    Congenital deformity of feet, unspecified, unspecified foot

  • Q66.91|

    Congenital deformity of feet, unspecified, right foot

  • Q66.92|

    Congenital deformity of feet, unspecified, left foot

  • Q67.0|

    Congenital facial asymmetry

  • Q67.1|

    Congenital compression facies

  • Q67.2|

    Dolichocephaly

  • Q67.3|

    Plagiocephaly

  • Q67.4|

    Other congenital deformities of skull, face and jaw

  • Q67.5|

    Congenital deformity of spine

  • Q67.6|

    Pectus excavatum

  • Q67.7|

    Pectus carinatum

  • Q67.8|

    Other congenital deformities of chest

  • Q68.0|

    Congenital deformity of sternocleidomastoid muscle

  • Q68.1|

    Congenital deformity of finger(s) and hand

  • Q68.2|

    Congenital deformity of knee

  • Q68.3|

    Congenital bowing of femur

  • Q68.4|

    Congenital bowing of tibia and fibula

  • Q68.5|

    Congenital bowing of long bones of leg, unspecified

  • Q68.6|

    Discoid meniscus

  • Q68.8|

    Other specified congenital musculoskeletal deformities

  • Q69.0|

    Accessory finger(s)

  • Q69.1|

    Accessory thumb(s)

  • Q69.2|

    Accessory toe(s)

  • Q69.9|

    Polydactyly, unspecified

  • Q70.00|

    Fused fingers, unspecified hand

  • Q70.01|

    Fused fingers, right hand

  • Q70.02|

    Fused fingers, left hand

  • Q70.03|

    Fused fingers, bilateral

  • Q70.10|

    Webbed fingers, unspecified hand

  • Q70.11|

    Webbed fingers, right hand

  • Q70.12|

    Webbed fingers, left hand

  • Q70.13|

    Webbed fingers, bilateral

  • Q70.20|

    Fused toes, unspecified foot

  • Q70.21|

    Fused toes, right foot

  • Q70.22|

    Fused toes, left foot

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