All ICD10 Codes

H18.4

Non-Billable
ChapterH00–H59
Ranksubcategory
Official Description

Corneal degeneration

Use a more specific code (3 billable, 5 non-billable)
H18.40Unspecified corneal degenerationH18.41Arcus senilishas subcodesH18.42Band keratopathyhas subcodesH18.43Other calcerous corneal degenerationH18.44Keratomalaciahas subcodesH18.45Nodular corneal degenerationhas subcodesH18.46Peripheral corneal degenerationhas subcodesH18.49Other corneal degeneration
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 7: Diseases of the Eye and Adnexa (H00-H59).

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • Mooren's ulcer (H16.0-)
  • recurrent erosion of cornea (H18.83-)
General instructions are available for the parent sections:
View CH7 Notes

Clinical Hierarchy

BillableHas subcodes
CH7Diseases of the eye and adnexa (H00-H59)
H15-H22Disorders of sclera, cornea, iris and ciliary body (H15-H22)
H18Other disorders of cornea
H18.4Corneal degenerationNot billable
H18.40Unspecified corneal degenerationBillable
H18.41Arcus senilisSubcodes
H18.42Band keratopathySubcodes
H18.43Other calcerous corneal degenerationBillable
H18.44KeratomalaciaSubcodes
H18.45Nodular corneal degenerationSubcodes
H18.46Peripheral corneal degenerationSubcodes
H18.49Other corneal degenerationBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H18.4:

chapterCH7
Diseases of the eye and adnexa (H00-H59)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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