Q90-Q99: Chromosomal abnormalities, not elsewhere classified

• Q90 – Down syndrome 4 billable codes
• Q91 – Trisomy 18 and Trisomy 13 8 billable codes
• Q92 – Other trisomies and partial trisomies of the autosomes, not elsewhere classified 9 billable codes
• Q93 – Monosomies and deletions from the autosomes, not elsewhere classified 14 billable codes
• Q95 – Balanced rearrangements and structural markers, not elsewhere classified 7 billable codes
• Q96 – Turner's syndrome 7 billable codes
• Q97 – Other sex chromosome abnormalities, female phenotype, not elsewhere classified 6 billable codes
• Q98 – Other sex chromosome abnormalities, male phenotype, not elsewhere classified 9 billable codes
• Q99 – Other chromosome abnormalities, not elsewhere classified 10 billable codes

Block notes