ICD-10-CM 2027
ICD-10 code for corneal membrane change
From the official ICD-10-CM alphabetic index entry “Change (s) (in) (of) › corneal membrane”. Page updated September 29, 2026.
About coding corneal membrane change
The ICD-10-CM code for corneal membrane change is H18.30 (Unspecified corneal membrane change). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H18.30.
Within H18.3, choose H18.30 (Unspecified corneal membrane change) only when documentation doesn't support a more specific option: folds and rupture in Bowman's membrane (H18.31), folds in Descemet's membrane (H18.32) and rupture in Descemet's membrane (H18.33).
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 corneal membrane change codes (official index)
Common questions about corneal membrane change ICD-10 codes
What is the ICD-10 code for corneal membrane change?
- H18.30 — Unspecified corneal membrane change. More specific codes apply when the documentation supports them: H18.31, H18.32, H18.33.
Is H18.30 billable?
- Yes. H18.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H18.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H18.30 as a principal diagnosis.
Is H18.30 a CC or MCC?
- No. H18.30 is neither a CC nor an MCC under MS-DRG v44.0.