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H18.21 vs H18.82

H18.21 (Corneal edema secondary to contact lens) compared with H18.82 (Corneal disorder due to contact lens), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. H18.21 carries an Excludes2 note covering H18.82: “other corneal disorders due to contact lens (H18.82-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Yes, when both are documented. H18.82 carries an Excludes2 note covering H18.21: “corneal edema due to contact lens (H18.21-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

H18.21Corneal edema secondary to contact lensH18.82Corneal disorder due to contact lens
Billing statusNon-billable header

Report instead: H18.211, H18.212, H18.213, H18.219

Non-billable header

Report instead: H18.821, H18.822, H18.823, H18.829

ClassificationH00-H59 — Diseases of the Eye and Adnexa (H00-H59)H00-H59 — Diseases of the Eye and Adnexa (H00-H59)
DefinitionCorneal edema secondary to contact lens is a non-billable ICD-10-CM category code (H18.21).Corneal disorder due to contact lens is a non-billable ICD-10-CM category code (H18.82).
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources