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Chapter 17

Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders

Q00–QA1

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FY 2027 effective October 1, 2026 · 89 categories in this chapter

Blocks in This Chapter

ICD-10-CM groups this chapter's categories into 12 blocks of three-character categories.

  1. Q00 –Q07 Congenital malformations of the nervous system
  2. Q10 –Q18 Congenital malformations of eye, ear, face and neck
  3. Q20 –Q28 Congenital malformations of the circulatory system
  4. Q30 –Q34 Congenital malformations of the respiratory system
  5. Q35 –Q37 Cleft lip and cleft palate
  6. Q38 –Q45 Other congenital malformations of the digestive system
  7. Q50 –Q56 Congenital malformations of genital organs
  8. Q60 –Q64 Congenital malformations of the urinary system
  9. Q65 –Q79 Congenital malformations and deformations of the musculoskeletal system
  10. Q80 –Q89 Other congenital malformations
  11. Q90 –Q99 Chromosomal abnormalities, not elsewhere classified
  12. QA0 –QA1 Genetic disorders, not elsewhere classified

Categories

Congenital malformations of the nervous system (Q00-Q07)

Congenital malformations of eye, ear, face and neck (Q10-Q18)

Congenital malformations of the circulatory system (Q20-Q28)

Congenital malformations of the respiratory system (Q30-Q34)

Cleft lip and cleft palate (Q35-Q37)

Other congenital malformations of the digestive system (Q38-Q45)

Congenital malformations of genital organs (Q50-Q56)

Congenital malformations of the urinary system (Q60-Q64)

Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)

Other congenital malformations (Q80-Q89)

Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Genetic disorders, not elsewhere classified (QA0-QA1)