Q98.8 Other specified sex chromosome abnormalities, male phenotype

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

MS-DRG index

Defines the logic of DRG(s) 729-730 in MDC 12.

Approximate ICD-9-CM (GEMs)

• 758.81 Other conditions due to sex chromosome anomalies (approximate)

Code annotations containing back-references to Q98.8

Back-references to Q98

• 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 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)")

Diagnosis Index entries for Q98.8

• Abnormal, abnormality, abnormalities › chromosome, chromosomal › sex › male phenotype › specified NEC
• Absence (of) (organ or part) (complete or partial) › sex chromosome › male phenotype

Nearby codes

• Q98.3 Other male with 46, XX karyotype
• Q98.4 Klinefelter syndrome, unspecified
• Q98.5 Karyotype 47, XYY
• Q98.6 Male with structurally abnormal sex chromosome
• Q98.7 Male with sex chromosome mosaicism
• Q98.8 Other specified sex chromosome abnormalities, male phenotype (this code)
• Q98.9 Sex chromosome abnormality, male phenotype, unspecified