ICD-10-CM 2027
ICD-10 code for lens anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › lens”. Page updated September 29, 2026.
About coding lens anomaly
The ICD-10-CM code for lens anomaly is Q12.9 (Congenital lens malformation, unspecified).
Within Q12, choose Q12.9 (Congenital lens malformation, unspecified) only when documentation doesn't support a more specific option: congenital cataract (Q12.0), congenital displaced lens (Q12.1), coloboma of lens (Q12.2), congenital aphakia (Q12.3), Spherophakia (Q12.4) and other congenital lens malformations (Q12.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about lens anomaly ICD-10 codes
What is the ICD-10 code for lens anomaly?
- Q12.9 — Congenital lens malformation, unspecified.
Is Q12.9 billable?
- Yes. Q12.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q12.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q12.9 as a principal diagnosis.
Is Q12.9 a CC or MCC?
- No. Q12.9 is neither a CC nor an MCC under MS-DRG v44.0.