Congenital malformations of anterior segment of eye (Q13) ICD-10-CM
The Q13 code range covers congenital malformations of anterior segment of eye with 11 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the Q13 Range 11 codes · 9 billable
- Q13 Congenital malformations of anterior segment of eyeNon-billable
- Q13.0 Coloboma of iris
- Q13.1 Absence of iris
- Q13.2 Other congenital malformations of iris
- Q13.3 Congenital corneal opacity
- Q13.4 Other congenital corneal malformations
- Q13.5 Blue sclera
- Q13.8 Other congenital malformations of anterior segment of eyeNon-billable
- Q13.81 Rieger anomaly
- Q13.89 Other congenital malformations of anterior segment of eye
- Q13.9 Congenital malformation of anterior segment of eye, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q13 range.
Aniridia
A congenital abnormality in which there is only a rudimentary iris. This is due to the failure of the optic cup to grow. Aniridia also occurs in a hereditary form, usually autosomal dominant.
Coloboma
Congenital anomaly in which some of the structures of the eye are absent due to incomplete fusion of the fetal intraocular fissure during gestation.
About the Q13 Code Range
These conditions are present at birth and affect the front part of the eye.
The subdivisions distinguish the iris, the colored part of the eye, from the cornea and sclera. Q13.0 identifies a coloboma of the iris, while Q13.1 identifies an absent iris. The corneal subdivisions distinguish opacity from other malformations; Q13.5 identifies blue sclera.
Q13.8 groups other malformations of the front part of the eye, with separate subdivisions for Rieger anomaly and other conditions. Q13.9 identifies an unspecified malformation of that area.
Questions About This Page
How many billable codes are in the Q13 range?
Of the 11 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Q13 range classify?
The range classifies congenital malformations of anterior segment of eye. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
