Q55.0

Absence and aplasia of testis

Billable / specificPOA exempt

Q55.0 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Monorchism

Includes (from Q55)

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

Excludes1

Not coded here — never report together with this code.

  • androgen insensitivity syndrome (E34.5-) (from Q55)
  • syndromes associated with anomalies in the number and form of chromosomes (Q90-Q99) (from Q55)
  • congenital hydrocele (P83.5) (from Q55)
  • hypospadias (Q54.-) (from Q55)

Excludes2

Not included here — may be reported together when both conditions exist.

  • inborn errors of metabolism (E70-E88) (from Q55)

Also known as

  • Monorchism
  • Absence, testis
  • Agenesis, testicle
  • Anorchia, anorchism, anorchidism
  • Aplasia, testicle
  • Malformation, testis and scrotum, aplasia
  • Monorchism, monorchidism

Parent code

  • Q55Other congenital malformations of male genital organsHeader

Related codes

  • Q55.1Hypoplasia of testis and scrotumBillable
  • Q55.2Other and unspecified congenital malformations of testis and scrotumHeader
  • Q55.3Atresia of vas deferensBillable
  • Q55.4Other congenital malformations of vas deferens, epididymis, seminal vesicles and prostateBillable
  • Q55.5Congenital absence and aplasia of penisBillable
  • Q55.6Other congenital malformations of penisHeader
  • Q55.7Congenital vasocutaneous fistulaBillable
  • Q55.8Other specified congenital malformations of male genital organsBillable
  • Q55.9Congenital malformation of male genital organ, unspecifiedBillable

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