Q93 Monosomies and deletions from the autosomes, not elsewhere classified

Category / Non-billable header 16 subcodes

Block: Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Subcodes

Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.

Code Description Billable
Q93..0 Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction) Yes
Q93..1 Whole chromosome monosomy, mosaicism (mitotic nondisjunction) Yes
Q93..2 Chromosome replaced with ring, dicentric or isochromosome Yes
Q93..3 Deletion of short arm of chromosome 4 Yes
Q93..4 Deletion of short arm of chromosome 5 Yes
Q93..5 Other deletions of part of a chromosome No
Q93..51 Angelman syndrome Yes
Q93..52 Phelan-McDermid syndrome Yes
Q93..59 Other deletions of part of a chromosome Yes
Q93..7 Deletions with other complex rearrangements Yes
Q93..8 Other deletions from the autosomes No
Q93..81 Velo-cardio-facial syndrome Yes
Q93..82 Williams syndrome Yes
Q93..88 Other microdeletions Yes
Q93..89 Other deletions from the autosomes Yes
Q93..9 Deletion from autosomes, unspecified Yes

Last reviewed: September 2026