Q13: Congenital malformations of anterior segment of eye
Codes under Q13 (Congenital malformations of anterior segment of eye). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q13.0 | Coloboma of iris | ✓ |
| Q13.0 | Coloboma of iris | ✓ |
| Q13.1 | Absence of iris | ✓ |
| Q13.1 | Absence of iris | ✓ |
| Q13.2 | Other congenital malformations of iris | ✓ |
| Q13.2 | Other congenital malformations of iris | ✓ |
| Q13.3 | Congenital corneal opacity | ✓ |
| Q13.3 | Congenital corneal opacity | ✓ |
| Q13.4 | Other congenital corneal malformations | ✓ |
| Q13.4 | Other congenital corneal malformations | ✓ |
| Q13.5 | Blue sclera | ✓ |
| Q13.5 | Blue sclera | ✓ |
| Q13.8 | Other congenital malformations of anterior segment of eye | — |
| Q13.8 | Other congenital malformations of anterior segment of eye | — |
| Q13.9 | Congenital malformation of anterior segment of eye, unspecified | ✓ |
| Q13.9 | Congenital malformation of anterior segment of eye, unspecified | ✓ |
| Q13.81 | Rieger anomaly | ✓ |
| Q13.81 | Rieger anomaly | ✓ |
| Q13.89 | Other congenital malformations of anterior segment of eye | ✓ |
| Q13.89 | Other congenital malformations of anterior segment of eye | ✓ |
Frequently asked questions
What is ICD-10-CM code Q13?
Q13 is an ICD-10-CM category covering Congenital malformations of anterior segment of eye. It contains 20 more specific diagnosis codes, 18 of which are billable.
Is Q13 a billable code?
No — Q13 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 Q13.0 — Coloboma of iris). 18 of the 20 codes under Q13 are billable.
What codes fall under Q13?
Q13 includes Q13.0, Q13.0, Q13.1, Q13.1, Q13.2, plus 15 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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