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  2. ICD-10-CM Codes List
  3. Q00-Q99
  4. Q10-Q18
  5. Congenital malformations of anterior segment of eye (Q13)

Congenital malformations of anterior segment of eye (Q13)

ICD-10 code Q13 covers a group of rare congenital malformations affecting the anterior segment of the eye. These codes are specifically used to identify birth defects involving key eye structures such as the iris, cornea, and sclera, helping healthcare providers accurately document conditions like coloboma of the iris (Q13.0) and absence of iris (Q13.1).

The detailed codes within the Q13 category correspond to distinct congenital abnormalities. For example, Q13.0 is used for iris coloboma, also known by terms like "congenital coloboma of iris," while Q13.1 refers to congenital absence of the iris, or aniridia, which may be linked with syndromes such as WAGR. Other codes include Q13.3 for congenital corneal opacity and Q13.5 for blue sclera, which can relate to osteogenesis imperfecta. More complex conditions like Rieger anomaly (Q13.81) and various anterior segment dysgenesis syndromes fall under Q13.8 or Q13.89. Coders seeking the ICD-10 code for congenital malformations of anterior eye segment can refer to these specific subcodes to capture precise diagnoses involving structural and developmental eye defects.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Anisocoria

Unequal pupil size, which may represent a benign physiologic variant or a manifestation of disease. Pathologic anisocoria reflects an abnormality in the musculature of the iris (IRIS DISEASES) or in the parasympathetic or sympathetic pathways that innervate the pupil. Physiologic anisocoria refers to an asymmetry of pupil diameter, usually less than 2mm, that is not associated with disease.

Dentinogenesis Imperfecta

An autosomal dominant disorder of tooth development characterized by opalescent dentin resulting in discoloration of the teeth. The dentin develops poorly with low mineral content while the pulp canal is obliterated.

Iris Diseases

Diseases, dysfunctions, or disorders of or located in the iris.

WAGR Syndrome

A contiguous gene syndrome associated with hemizygous deletions of chromosome region 11p13. The condition is marked by the combination of WILMS TUMOR; ANIRIDIA; GENITOURINARY ABNORMALITIES; and INTELLECTUAL DISABILITY.