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ICD-Code Q55.0: Absence and aplasia of testis

One or both of your testicles have not developed.

The testicles are located outside the body, and are covered by skin. That is the scrotum.The testicles produce male sex hormones. An example of a male sex hormone is testosterone.

While developing in the womb, many different types of tissue develop in the body. The organs and body parts develop out of the various types of tissue.If tissue fails to develop, organs or body parts may be absent.

If a single testicle fails to develop, a sufficient amount of male sex hormones is usually still produced. This is because the other testicle increases its production of sex hormones. However, if both testicles fail to develop during development in the womb, a sufficient amount of male sex hormones is not produced. The male sex hormones produced by the testicles are important for developing the other male sex organs. This means that, if the testicles fail to develop, the penis and scrotum may also fail to develop.

If the testicles do not develop properly at the earliest stage of development in the womb, the baby may be born with the external appearance of a female. They may also be unable to reproduce naturally in adulthood.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides
Further information

Note

This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.

Source

The explanation of the ICD code was provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).