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