Circular 06/2026
Chapter XVII — Congenital malformations, deformations and chromosomal abnormalities
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Q00-Q07 — Congenital malformations of the nervous system
Q10-Q18 — Congenital malformations of eye, ear, face and neck
Q10Congenital malformations of eyelid, lacrimal apparatus and orbitQ11Anophthalmos, microphthalmos and macrophthalmosQ12Congenital lens malformationsQ13Congenital malformations of anterior segment of eyeQ14Congenital malformations of posterior segment of eyeQ15Other congenital malformations of eyeQ16Congenital malformations of ear causing impairment of hearingQ17Other congenital malformations of earQ18Other congenital malformations of face and neck
Q20-Q28 — Congenital malformations of the circulatory system
Q20Congenital malformations of cardiac chambers and connectionsQ21Congenital malformations of cardiac septaQ22Congenital malformations of pulmonary and tricuspid valvesQ23Congenital malformations of aortic and mitral valvesQ24Other congenital malformations of heartQ25Congenital malformations of great arteriesQ26Congenital malformations of great veinsQ27Other congenital malformations of peripheral vascular systemQ28Other 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
Q38Other congenital malformations of tongue, mouth and pharynxQ39Congenital malformations of oesophagusQ40Other congenital malformations of upper alimentary tractQ41Congenital absence, atresia and stenosis of small intestineQ42Congenital absence, atresia and stenosis of large intestineQ43Other congenital malformations of intestineQ44Congenital malformations of gallbladder, bile ducts and liverQ45Other congenital malformations of digestive system
Q50-Q56 — Congenital malformations of genital organs
Q50Congenital malformations of ovaries, fallopian tubes and broad ligamentsQ51Congenital malformations of uterus and cervixQ52Other congenital malformations of female genitaliaQ53Undescended testicleQ54HypospadiasQ55Other congenital malformations of male genital organsQ56Indeterminate sex and pseudohermaphroditism
Q60-Q64 — Congenital malformations of the urinary system
Q65-Q79 — Congenital malformations and deformations of the musculoskeletal system
Q65Congenital deformities of hipQ66Congenital deformities of feetQ67Congenital musculoskeletal deformities of head, face, spine and chestQ68Other congenital musculoskeletal deformitiesQ69PolydactylyQ70SyndactylyQ71Reduction defects of upper limbQ72Reduction defects of lower limbQ73Reduction defects of unspecified limbQ74Other congenital malformations of limb(s)Q75Other congenital malformations of skull and face bonesQ76Congenital malformations of spine and bony thoraxQ77Osteochondrodysplasia with defects of growth of tubular bones and spineQ78Other osteochondrodysplasiasQ79Congenital malformations of the musculoskeletal system, not elsewhere classified
Q80-Q89 — Other congenital malformations
Q80Congenital ichthyosisQ81Epidermolysis bullosaQ82Other congenital malformations of skinQ83Congenital malformations of breastQ84Other congenital malformations of integumentQ85Phakomatoses, not elsewhere classifiedQ86Congenital malformation syndromes due to known exogenous causes, not elsewhere classifiedQ87Other specified congenital malformation syndromes affecting multiple systemsQ89Other congenital malformations, not elsewhere classified
Q90-Q99 — Chromosomal abnormalities, not elsewhere classified
Q90Down syndromeQ91Edwards syndrome and Patau syndromeQ92Other trisomies and partial trisomies of the autosomes, not elsewhere classifiedQ93Monosomies and deletions from the autosomes, not elsewhere classifiedQ95Balanced rearrangements and structural markers, not elsewhere classifiedQ96Turner syndromeQ97Other sex chromosome abnormalities, female phenotype, not elsewhere classifiedQ98Other sex chromosome abnormalities, male phenotype, not elsewhere classifiedQ99Other chromosome abnormalities, not elsewhere classified