ICD-10-CM · Chapter 17 · Q00-QA1
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
900 billable diagnosis codes across 12 code blocks. FY2027 release.
Excludes 2 (not included here)
- inborn errors of metabolism (E70-E88)
Q00-Q07 Congenital malformations of the nervous system
Q10-Q18 Congenital malformations of eye, ear, face and neck
- Q10 Congenital malformations of eyelid, lacrimal apparatus and orbit
- Q11 Anophthalmos, microphthalmos and macrophthalmos
- Q12 Congenital lens malformations
- Q13 Congenital malformations of anterior segment of eye
- Q14 Congenital malformations of posterior segment of eye
- Q15 Other congenital malformations of eye
- Q16 Congenital malformations of ear causing impairment of hearing
- Q17 Other congenital malformations of ear
- Q18 Other congenital malformations of face and neck
Q20-Q28 Congenital malformations of the circulatory system
- Q20 Congenital malformations of cardiac chambers and connections
- Q21 Congenital malformations of cardiac septa
- Q22 Congenital malformations of pulmonary and tricuspid valves
- Q23 Congenital malformations of aortic and mitral valves
- Q24 Other congenital malformations of heart
- Q25 Congenital malformations of great arteries
- Q26 Congenital malformations of great veins
- Q27 Other congenital malformations of peripheral vascular system
- Q28 Other congenital malformations of circulatory system
Q30-Q34 Congenital malformations of the respiratory system
Q35-Q37 Cleft lip and cleft palate
Q38-Q45 Other congenital malformations of the digestive system
- Q38 Other congenital malformations of tongue, mouth and pharynx
- Q39 Congenital malformations of esophagus
- Q40 Other congenital malformations of upper alimentary tract
- Q41 Congenital absence, atresia and stenosis of small intestine
- Q42 Congenital absence, atresia and stenosis of large intestine
- Q43 Other congenital malformations of intestine
- Q44 Congenital malformations of gallbladder, bile ducts and liver
- Q45 Other congenital malformations of digestive system
Q50-Q56 Congenital malformations of genital organs
- Q50 Congenital malformations of ovaries, fallopian tubes and broad ligaments
- Q51 Congenital malformations of uterus and cervix
- Q52 Other congenital malformations of female genitalia
- Q53 Undescended and ectopic testicle
- Q54 Hypospadias
- Q55 Other congenital malformations of male genital organs
- Q56 Indeterminate sex and pseudohermaphroditism
Q60-Q64 Congenital malformations of the urinary system
Q65-Q79 Congenital malformations and deformations of the musculoskeletal system
- Q65 Congenital deformities of hip
- Q66 Congenital deformities of feet
- Q67 Congenital musculoskeletal deformities of head, face, spine and chest
- Q68 Other congenital musculoskeletal deformities
- Q69 Polydactyly
- Q70 Syndactyly
- Q71 Reduction defects of upper limb
- Q72 Reduction defects of lower limb
- Q73 Reduction defects of unspecified limb
- Q74 Other congenital malformations of limb(s)
- Q75 Other congenital malformations of skull and face bones
- Q76 Congenital malformations of spine and bony thorax
- Q77 Osteochondrodysplasia with defects of growth of tubular bones and spine
- Q78 Other osteochondrodysplasias
- Q79 Congenital malformations of musculoskeletal system, not elsewhere classified
Q80-Q89 Other congenital malformations
- Q80 Congenital ichthyosis
- Q81 Epidermolysis bullosa
- Q82 Other congenital malformations of skin
- Q83 Congenital malformations of breast
- Q84 Other congenital malformations of integument
- Q85 Phakomatoses, not elsewhere classified
- Q86 Congenital malformation syndromes due to known exogenous causes, not elsewhere classified
- Q87 Other specified congenital malformation syndromes affecting multiple systems
- Q89 Other congenital malformations, not elsewhere classified
Q90-Q99 Chromosomal abnormalities, not elsewhere classified
- Q90 Down syndrome
- Q91 Trisomy 18 and Trisomy 13
- Q92 Other trisomies and partial trisomies of the autosomes, not elsewhere classified
- Q93 Monosomies and deletions from the autosomes, not elsewhere classified
- Q95 Balanced rearrangements and structural markers, not elsewhere classified
- Q96 Turner's syndrome
- Q97 Other sex chromosome abnormalities, female phenotype, not elsewhere classified
- Q98 Other sex chromosome abnormalities, male phenotype, not elsewhere classified
- Q99 Other chromosome abnormalities, not elsewhere classified
QA0-QA1 Genetic disorders, not elsewhere classified
Last reviewed: September 2026