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Q00-Q99 - Congenital malformations, deformations and chromosomal abnormalities

ICD-10-CM Chapter 17 · 12 sections · 89 categories · 1,095 codes · FY2027

Covers congenital malformations, deformations, and chromosomal abnormalities present at birth.

Chapter Notes

Excludes 2 — Not Included HereFrom Chapter Q00-Q99

Not part of this code; report both codes when the patient has both conditions.

  • inborn errors of metabolism (E70-E88)
NotesFrom Chapter Q00-Q99

Instructional notes from the ICD-10-CM tabular list.

  • Codes from this chapter are not for use on maternal records

Categories in this Chapter (89)

Q00-Q07Congenital malformations of the nervous system (Q00-Q07)(8)

Q00Anencephaly and similar malformations3 codes→
Q01Encephalocele5 codes→
Q02Microcephaly→
Q03Congenital hydrocephalus4 codes→
Q04Other congenital malformations of brain9 codes→
Q05Spina bifida10 codes→
Q06Other congenital malformations of spinal cord7 codes→
Q07Other congenital malformations of nervous system7 codes→

Q10-Q18Congenital malformations of eye, ear, face and neck (Q10-Q18)(9)

Q10Congenital malformations of eyelid, lacrimal apparatus and orbit8 codes→
Q11Anophthalmos, microphthalmos and macrophthalmos4 codes→
Q12Congenital lens malformations7 codes→
Q13Congenital malformations of anterior segment of eye10 codes→
Q14Congenital malformations of posterior segment of eye6 codes→
Q15Other congenital malformations of eye3 codes→
Q16Congenital malformations of ear causing impairment of hearing7 codes→
Q17Other congenital malformations of ear8 codes→
Q18Other congenital malformations of face and neck10 codes→

Q20-Q28Congenital malformations of the circulatory system (Q20-Q28)(9)

Q20Congenital malformations of cardiac chambers and connections9 codes→
Q21Congenital malformations of cardiac septa19 codes→
Q22Congenital malformations of pulmonary and tricuspid valves9 codes→
Q23Congenital malformations of aortic and mitral valves10 codes→
Q24Other congenital malformations of heart9 codes→
Q25Congenital malformations of great arteries25 codes→
Q26Congenital malformations of great veins9 codes→
Q27Other congenital malformations of peripheral vascular system13 codes→
Q28Other congenital malformations of circulatory system6 codes→

Q30-Q34Congenital malformations of the respiratory system (Q30-Q34)(5)

Q30Congenital malformations of nose6 codes→
Q31Congenital malformations of larynx7 codes→
Q32Congenital malformations of trachea and bronchus5 codes→
Q33Congenital malformations of lung9 codes→
Q34Other congenital malformations of respiratory system4 codes→

Q35-Q37Cleft lip and cleft palate (Q35-Q37)(3)

Q35Cleft palate5 codes→
Q36Cleft lip3 codes→
Q37Cleft palate with cleft lip8 codes→

Q38-Q45Other congenital malformations of the digestive system (Q38-Q45)(8)

Q38Other congenital malformations of tongue, mouth and pharynx9 codes→
Q39Congenital malformations of esophagus9 codes→
Q40Other congenital malformations of upper alimentary tract6 codes→
Q41Congenital absence, atresia and stenosis of small intestine5 codes→
Q42Congenital absence, atresia and stenosis of large intestine6 codes→
Q43Other congenital malformations of intestine10 codes→
Q44Congenital malformations of gallbladder, bile ducts and liver11 codes→
Q45Other congenital malformations of digestive system6 codes→

Q50-Q56Congenital malformations of genital organs (Q50-Q56)(7)

Q50Congenital malformations of ovaries, fallopian tubes and broad ligaments12 codes→
Q51Congenital malformations of uterus and cervix23 codes→
Q52Other congenital malformations of female genitalia22 codes→
Q53Undescended and ectopic testicle19 codes→
Q54Hypospadias7 codes→
Q55Other congenital malformations of male genital organs20 codes→
Q56Indeterminate sex and pseudohermaphroditism5 codes→

Q60-Q64Congenital malformations of the urinary system (Q60-Q64)(5)

Q60Renal agenesis and other reduction defects of kidney7 codes→
Q61Cystic kidney disease13 codes→
Q62Congenital obstructive defects of renal pelvis and congenital malformations of ureter20 codes→
Q63Other congenital malformations of kidney6 codes→
Q64Other congenital malformations of urinary system25 codes→

Q65-Q79Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)(15)

Q65Congenital deformities of hip18 codes→
Q66Congenital deformities of feet43 codes→
Q67Congenital musculoskeletal deformities of head, face, spine and chest9 codes→
Q68Other congenital musculoskeletal deformities8 codes→
Q69Polydactyly4 codes→
Q70Syndactyly22 codes→
Q71Reduction defects of upper limb51 codes→
Q72Reduction defects of lower limb56 codes→
Q73Reduction defects of unspecified limb3 codes→
Q74Other congenital malformations of limb(s)6 codes→
Q75Other congenital malformations of skull and face bones27 codes→
Q76Congenital malformations of spine and bony thorax24 codes→
Q77Osteochondrodysplasia with defects of growth of tubular bones and spine10 codes→
Q78Other osteochondrodysplasias9 codes→
Q79Congenital malformations of musculoskeletal system, not elsewhere classified16 codes→

Q80-Q89Other congenital malformations (Q80-Q89)(9)

Q80Congenital ichthyosis7 codes→
Q81Epidermolysis bullosa5 codes→
Q82Other congenital malformations of skin9 codes→
Q83Congenital malformations of breast6 codes→
Q84Other congenital malformations of integument9 codes→
Q85Phakomatoses, not elsewhere classified13 codes→
Q86Congenital malformation syndromes due to known exogenous causes, not elsewhere classified4 codes→
Q87Other specified congenital malformation syndromes affecting multiple systems25 codes→
Q89Other congenital malformations, not elsewhere classified12 codes→

Q90-Q99Chromosomal abnormalities, not elsewhere classified (Q90-Q99)(9)

Q90Down syndrome4 codes→
Q91Trisomy 18 and Trisomy 138 codes→
Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classified10 codes→
Q93Monosomies and deletions from the autosomes, not elsewhere classified16 codes→
Q95Balanced rearrangements and structural markers, not elsewhere classified7 codes→
Q96Turner's syndrome7 codes→
Q97Other sex chromosome abnormalities, female phenotype, not elsewhere classified6 codes→
Q98Other sex chromosome abnormalities, male phenotype, not elsewhere classified9 codes→
Q99Other chromosome abnormalities, not elsewhere classified12 codes→

QA0-QA1Genetic disorders, not elsewhere classified (QA0-QA1)(2)

QA0Neurodevelopmental disorders related to specific genetic pathogenic variants19 codes→
QA1Genetic disorders associated with neoplasms, not elsewhere classified7 codes→