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Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)

Assign an appropriate code(s) from categories Q00-Q99, Congenital malformations, deformations, and chromosomal abnormalities when a malformation/deformation or chromosomal abnormality is documented. A malformation/deformation/or chromosomal abnormality may be the principal/first-listed diagnosis on a record or a secondary diagnosis.

  • Notes:
    • Codes from this chapter are not for use on maternal or fetal records
  • Exclude 2:
    • inborn errors of metabolism (E70-E88,)

  • Q00-Q07 Congenital malformations of the nervous system (Q00-Q07)
  • Q10-Q18 Congenital malformations of eye, ear, face and neck (Q10-Q18)
  • Q20-Q28 Congenital malformations of the circulatory system (Q20-Q28)
  • Q30-Q34 Congenital malformations of the respiratory system (Q30-Q34)
  • Q35-Q37 Cleft lip and cleft palate (Q35-Q37)
  • Q38-Q45 Other congenital malformations of the digestive system (Q38-Q45)
  • Q50-Q56 Congenital malformations of genital organs (Q50-Q56)
  • Q60-Q64 Congenital malformations of the urinary system (Q60-Q64)
  • Q65-Q79 Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
  • Q80-Q89 Other congenital malformations (Q80-Q89)
  • Q90-Q99 Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

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