• mitochondrial metabolic disorders (E88.4-)
  1. Q99 Other chromosome abnormalities, not elsewhere classified

    1. Q99.0 Chimera 46, XX/46, XY

      Inclusion term(s):

      • Chimera 46, XX/46, XY true hermaphrodite
    2. Q99.1 46, XX true hermaphrodite

      Inclusion term(s):

      • 46, XX with streak gonads
      • 46, XY with streak gonads
      • Pure gonadal dysgenesis
    3. Q99.2 Fragile X chromosome

      Inclusion term(s):

      • Fragile X syndrome
    4. Q99.8 Other specified chromosome abnormalities

    5. Q99.9 Chromosomal abnormality, unspecified

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.