All ICD10 Codes
Chapter 17

Q00–Q99: Congenital Malformations, Deformations and Chromosomal Abnormalities

Congenital Malformations, Deformations and Chromosomal Abnormalities diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)
All CodesBillable Only
Internal Codes
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  • Q51.82—

    Other congenital malformations of cervix

  • Q51.820—

    Cervical duplication

  • Q51.821—

    Hypoplasia of cervix

  • Q51.828—

    Other congenital malformations of cervix

  • Q51.9—

    Congenital malformation of uterus and cervix, unspecified

  • Q52—

    Other congenital malformations of female genitalia

  • Q52.0—

    Congenital absence of vagina

  • Q52.1—

    Doubling of vagina

  • Q52.10—

    Doubling of vagina, unspecified

  • Q52.11—

    Transverse vaginal septum

  • Q52.12—

    Longitudinal vaginal septum

  • Q52.120—

    Longitudinal vaginal septum, nonobstructing

  • Q52.121—

    Longitudinal vaginal septum, obstructing, right side

  • Q52.122—

    Longitudinal vaginal septum, obstructing, left side

  • Q52.123—

    Longitudinal vaginal septum, microperforate, right side

  • Q52.124—

    Longitudinal vaginal septum, microperforate, left side

  • Q52.129—

    Other and unspecified longitudinal vaginal septum

  • Q52.2—

    Congenital rectovaginal fistula

  • Q52.3—

    Imperforate hymen

  • Q52.4—

    Other congenital malformations of vagina

  • Q52.5—

    Fusion of labia

  • Q52.6—

    Congenital malformation of clitoris

  • Q52.7—

    Other and unspecified congenital malformations of vulva

  • Q52.70—

    Unspecified congenital malformations of vulva

  • Q52.71—

    Congenital absence of vulva

  • Q52.79—

    Other congenital malformations of vulva

  • Q52.8—

    Other specified congenital malformations of female genitalia

  • Q52.9—

    Congenital malformation of female genitalia, unspecified

  • Q53—

    Undescended and ectopic testicle

  • Q53.0—

    Ectopic testis

  • Q53.00—

    Ectopic testis, unspecified

  • Q53.01—

    Ectopic testis, unilateral

  • Q53.02—

    Ectopic testes, bilateral

  • Q53.1—

    Undescended testicle, unilateral

  • Q53.10—

    Unspecified undescended testicle, unilateral

  • Q53.11—

    Abdominal testis, unilateral

  • Q53.111—

    Unilateral intraabdominal testis

  • Q53.112—

    Unilateral inguinal testis

  • Q53.12—

    Ectopic perineal testis, unilateral

  • Q53.13—

    Unilateral high scrotal testis

  • Q53.2—

    Undescended testicle, bilateral

  • Q53.20—

    Undescended testicle, unspecified, bilateral

  • Q53.21—

    Abdominal testis, bilateral

  • Q53.211—

    Bilateral intraabdominal testes

  • Q53.212—

    Bilateral inguinal testes

  • Q53.22—

    Ectopic perineal testis, bilateral

  • Q53.23—

    Bilateral high scrotal testes

  • Q53.9—

    Undescended testicle, unspecified

  • Q54—

    Hypospadias

  • Q54.0—

    Hypospadias, balanic

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