ICD-10-CM 2027
ICD-10 code for eye anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › eye”. Page updated September 29, 2026.
About coding eye anomaly
The ICD-10-CM code for eye anomaly is Q15.9 (Congenital malformation of eye, unspecified). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q15.9.
Within Q15, choose Q15.9 (Congenital malformation of eye, unspecified) only when documentation doesn't support a more specific option: congenital glaucoma (Q15.0) and other specified congenital malformations of eye (Q15.8).
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.
More specific eye anomaly codes (official index)
- anterior segment Q13.9 — Congenital malformation of anterior segment of eye, unspecified
- specified NEC Q13.89 — Other congenital malformations of anterior segment of eye
- posterior segment Q14.9 — Congenital malformation of posterior segment of eye, unspecified
- specified NEC Q14.8 — Other congenital malformations of posterior segment of eye
- ptosis (eyelid) Q10.0 — Congenital ptosis
- specified NEC Q15.8 — Other specified congenital malformations of eye
Common questions about eye anomaly ICD-10 codes
What is the ICD-10 code for eye anomaly?
- Q15.9 — Congenital malformation of eye, unspecified. More specific codes apply when the documentation supports them: Q13.9, Q13.89, Q14.9, Q14.8 and others below.
What is the ICD-10 code for anterior segment eye anomaly?
- Q13.9 — Congenital malformation of anterior segment of eye, unspecified.
What is the ICD-10 code for posterior segment eye anomaly?
- Q14.9 — Congenital malformation of posterior segment of eye, unspecified.
What is the ICD-10 code for ptosis eye anomaly?
- Q10.0 — Congenital ptosis.
Is Q15.9 billable?
- Yes. Q15.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q15.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q15.9 as a principal diagnosis.
Is Q15.9 a CC or MCC?
- No. Q15.9 is neither a CC nor an MCC under MS-DRG v44.0.