ICD-10-CM diagnosis code
H18.462 Peripheral corneal degeneration, left eye
- Billable
- Yes, a complete code (FY2026)
- Category
- H18 Other disorders of cornea
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Other codes in H18
155 complete codes in this category.
- H18.449Keratomalacia, unspecified eye
- H18.451Nodular corneal degeneration, right eye
- H18.452Nodular corneal degeneration, left eye
- H18.453Nodular corneal degeneration, bilateral
- H18.459Nodular corneal degeneration, unspecified eye
- H18.461Peripheral corneal degeneration, right eye
- H18.462Peripheral corneal degeneration, left eye
- H18.463Peripheral corneal degeneration, bilateral
- H18.469Peripheral corneal degeneration, unspecified eye
- H18.49Other corneal degeneration
- H18.501Unspecified hereditary corneal dystrophies, right eye
- H18.502Unspecified hereditary corneal dystrophies, left eye
Documentation tips
- Make sure the note supports every element of the title, “Peripheral corneal degeneration, left eye”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to H18.
The international WHO ICD-10 also has H18, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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