Congenital lens malformations (Q12) ICD-10-CM
The Q12 code range covers congenital lens malformations with 8 ICD-10-CM diagnosis codes. 7 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 Q12 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q12 range.
Congenital Aphakia
The absence of the lens of the eye that is present at the time of birth.
Congenital Cataract
Cataract that is present at birth.
Spherophakia
A congenital disorder of the eye where the lens is abnormally small and spherical.
About the Q12 Code Range
These conditions involve a malformation of the eye’s lens present at birth.
The subdivisions distinguish congenital cataract (Q12.0), a displaced lens (Q12.1), and coloboma of the lens (Q12.2). They also name congenital aphakia (Q12.3) and spherophakia (Q12.4). Other congenital lens malformations have Q12.8; an unspecified congenital lens malformation has Q12.9.
Questions About This Page
How many billable codes are in the Q12 range?
Of the 8 codes in this range, 7 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 Q12 range classify?
The range classifies congenital lens malformations. 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.
