Other deletions of part of a chromosome

This code signifies a genetic condition characterized by the absence of a segment of a chromosome, excluding specific deletions like Cri-du-chat syndrome or Prader-Willi/Angelman syndromes. These deletions can lead to a wide range of developmental, intellectual, and physical abnormalities depending on the size and location of the missing chromosomal material.

Assign this code when documentation confirms a chromosomal deletion that is not otherwise specified or classified to a more specific code. This typically follows genetic testing results (e.g., karyotype, microarray) identifying a partial chromosomal deletion. Use when the specific chromosome or region involved is not precisely defined by another code.

• Ensure the documentation clearly states a "deletion" of a "part of a chromosome" and not a duplication or other chromosomal anomaly.
• Review the genetic test report carefully to determine if a more specific deletion syndrome code (e.g., Q93.3 for Cri-du-chat) is applicable.
• This code is often used when the deletion is novel, uncharacterized, or not yet assigned a specific syndrome code.