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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  • 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

  • Q52.70—

    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

  • Q53.00—

    Ectopic testis, unspecified

  • Q53.01—

    Ectopic testis, unilateral

  • Q53.02—

    Ectopic testes, bilateral

  • Q53.10—

    Unspecified undescended testicle, unilateral

  • Q53.111—

    Unilateral intraabdominal testis

  • Q53.112—

    Unilateral inguinal testis

  • Q53.12—

    Ectopic perineal testis, unilateral

  • Q53.13—

    Unilateral high scrotal testis

  • Q53.20—

    Undescended testicle, unspecified, 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

  • Q54.0—

    Hypospadias, balanic

  • Q54.1—

    Hypospadias, penile

  • Q54.2—

    Hypospadias, penoscrotal

  • Q54.3—

    Hypospadias, perineal

  • Q54.4—

    Congenital chordee

  • Q54.8—

    Other hypospadias

  • Q54.9—

    Hypospadias, unspecified

  • Q55.0—

    Absence and aplasia of testis

  • Q55.1—

    Hypoplasia of testis and scrotum

  • Q55.20—

    Unspecified congenital malformations of testis and scrotum

  • Q55.21—

    Polyorchism

  • Q55.22—

    Retractile testis

  • Q55.23—

    Scrotal transposition

  • Q55.29—

    Other congenital malformations of testis and scrotum

  • Q55.3—

    Atresia of vas deferens

  • Q55.4—

    Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostate

  • Q55.5—

    Congenital absence and aplasia of penis

  • Q55.61—

    Curvature of penis (lateral)

  • Q55.62—

    Hypoplasia of penis

  • Q55.63—

    Congenital torsion of penis

  • Q55.64—

    Hidden penis

  • Q55.69—

    Other congenital malformation of penis

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