Q99 Other chromosome abnormalities, not elsewhere classified

Non-billable header with 5 child codes.

Codes under Q99

• Q99.0 Chimera 46, XX/46, XY
• Q99.1 46, XX true hermaphrodite
• Q99.2 Fragile X chromosome
• Q99.8 Other specified chromosome abnormalities
• Q99.9 Chromosomal abnormality, unspecified

Code annotations containing back-references to Q99

Back-references to Q99

• Code First: D84.81 Immunodeficiency due to conditions classified elsewhere ("chromosomal abnormalities (Q90-Q99)")
• Type 1 Excludes: E25 Adrenogenital disorders ("chromosomal abnormalities (Q90-Q99)")
• Type 2 Excludes: P04 Newborn affected by noxious substances transmitted via placenta or breast milk ("congenital malformations (Q00-Q99)")
• Type 1 Excludes: Q56 Indeterminate sex and pseudohermaphroditism ("pseudohermaphroditism with specified chromosomal anomaly (Q96-Q99)")
• Type 1 Excludes: Z15 Genetic susceptibility to disease ("chromosomal anomalies (Q90-Q99)")

Back-references to Q99

• Code First: D84.81 Immunodeficiency due to conditions classified elsewhere ("chromosomal abnormalities (Q90-Q99)")
• Type 1 Excludes: E25 Adrenogenital disorders ("chromosomal abnormalities (Q90-Q99)")
• Type 2 Excludes: P04 Newborn affected by noxious substances transmitted via placenta or breast milk ("congenital malformations (Q00-Q99)")
• Type 1 Excludes: Q56 Indeterminate sex and pseudohermaphroditism ("pseudohermaphroditism with specified chromosomal anomaly (Q96-Q99)")
• Type 1 Excludes: Z15 Genetic susceptibility to disease ("chromosomal anomalies (Q90-Q99)")

Nearby codes

• Q99 Other chromosome abnormalities, not elsewhere classified (this code)
• Q99.0 Chimera 46, XX/46, XY
• Q99.1 46, XX true hermaphrodite
• Q99.2 Fragile X chromosome
• Q99.8 Other specified chromosome abnormalities
• Q99.81 Usher syndrome