Q42: Congenital absence, atresia and stenosis of large intestine
Codes under Q42 (Congenital absence, atresia and stenosis of large intestine). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q42.0 | Congenital absence, atresia and stenosis of rectum with fistula | ✓ |
| Q42.0 | Congenital absence, atresia and stenosis of rectum with fistula | ✓ |
| Q42.1 | Congenital absence, atresia and stenosis of rectum without fistula | ✓ |
| Q42.1 | Congenital absence, atresia and stenosis of rectum without fistula | ✓ |
| Q42.2 | Congenital absence, atresia and stenosis of anus with fistula | ✓ |
| Q42.2 | Congenital absence, atresia and stenosis of anus with fistula | ✓ |
| Q42.3 | Congenital absence, atresia and stenosis of anus without fistula | ✓ |
| Q42.3 | Congenital absence, atresia and stenosis of anus without fistula | ✓ |
| Q42.8 | Congenital absence, atresia and stenosis of other parts of large intestine | ✓ |
| Q42.8 | Congenital absence, atresia and stenosis of other parts of large intestine | ✓ |
| Q42.9 | Congenital absence, atresia and stenosis of large intestine, part unspecified | ✓ |
| Q42.9 | Congenital absence, atresia and stenosis of large intestine, part unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code Q42?
Q42 is an ICD-10-CM category covering Congenital absence, atresia and stenosis of large intestine. It contains 12 more specific diagnosis codes, 12 of which are billable.
Is Q42 a billable code?
No — Q42 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 Q42.0 — Congenital absence, atresia and stenosis of rectum with fistula). 12 of the 12 codes under Q42 are billable.
What codes fall under Q42?
Q42 includes Q42.0, Q42.0, Q42.1, Q42.1, Q42.2, plus 7 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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