Q93: Monosomies and deletions from the autosomes, not elsewhere classified
Codes under Q93 (Monosomies and deletions from the autosomes, not elsewhere classified). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q93.0 | Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction) | ✓ |
| Q93.0 | Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction) | ✓ |
| Q93.1 | Whole chromosome monosomy, mosaicism (mitotic nondisjunction) | ✓ |
| Q93.1 | Whole chromosome monosomy, mosaicism (mitotic nondisjunction) | ✓ |
| Q93.2 | Chromosome replaced with ring, dicentric or isochromosome | ✓ |
| Q93.2 | Chromosome replaced with ring, dicentric or isochromosome | ✓ |
| Q93.3 | Deletion of short arm of chromosome 4 | ✓ |
| Q93.3 | Deletion of short arm of chromosome 4 | ✓ |
| Q93.4 | Deletion of short arm of chromosome 5 | ✓ |
| Q93.4 | Deletion of short arm of chromosome 5 | ✓ |
| Q93.5 | Other deletions of part of a chromosome | — |
| Q93.5 | Other deletions of part of a chromosome | — |
| Q93.7 | Deletions with other complex rearrangements | ✓ |
| Q93.7 | Deletions with other complex rearrangements | ✓ |
| Q93.8 | Other deletions from the autosomes | — |
| Q93.8 | Other deletions from the autosomes | — |
| Q93.9 | Deletion from autosomes, unspecified | ✓ |
| Q93.9 | Deletion from autosomes, unspecified | ✓ |
| Q93.51 | Angelman syndrome | ✓ |
| Q93.51 | Angelman syndrome | ✓ |
| Q93.52 | Phelan-McDermid syndrome | ✓ |
| Q93.52 | Phelan-McDermid syndrome | ✓ |
| Q93.59 | Other deletions of part of a chromosome | ✓ |
| Q93.59 | Other deletions of part of a chromosome | ✓ |
| Q93.81 | Velo-cardio-facial syndrome | ✓ |
| Q93.81 | Velo-cardio-facial syndrome | ✓ |
| Q93.82 | Williams syndrome | ✓ |
| Q93.82 | Williams syndrome | ✓ |
| Q93.88 | Other microdeletions | ✓ |
| Q93.88 | Other microdeletions | ✓ |
| Q93.89 | Other deletions from the autosomes | ✓ |
| Q93.89 | Other deletions from the autosomes | ✓ |
Frequently asked questions
What is ICD-10-CM code Q93?
Q93 is an ICD-10-CM category covering Monosomies and deletions from the autosomes, not elsewhere classified. It contains 32 more specific diagnosis codes, 28 of which are billable.
Is Q93 a billable code?
No — Q93 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Q93.0 — Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction)). 28 of the 32 codes under Q93 are billable.
What codes fall under Q93?
Q93 includes Q93.0, Q93.0, Q93.1, Q93.1, Q93.2, plus 27 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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