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H18 Other disorders of cornea

ICD-10-CM category H18 sits in Chapter 7 (Diseases of the eye and adnexa, H00-H59). It contains 155 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

H18.0 Corneal pigmentations and depositsH18.00 Unspecified corneal depositH18.01 Anterior corneal pigmentationsH18.02 Argentous corneal depositsH18.03 Corneal deposits in metabolic disordersH18.04 Kayser-Fleischer ringH18.05 Posterior corneal pigmentationsH18.06 Stromal corneal pigmentationsH18.1 Bullous keratopathyH18.2 Other and unspecified corneal edemaH18.21 Corneal edema secondary to contact lensH18.22 Idiopathic corneal edemaH18.23 Secondary corneal edemaH18.3 Changes of corneal membranesH18.31 Folds and rupture in Bowman's membraneH18.32 Folds in Descemet's membraneH18.33 Rupture in Descemet's membraneH18.4 Corneal degenerationH18.41 Arcus senilisH18.42 Band keratopathyH18.44 KeratomalaciaH18.45 Nodular corneal degenerationH18.46 Peripheral corneal degenerationH18.5 Hereditary corneal dystrophiesH18.50 Unspecified hereditary corneal dystrophiesH18.51 Endothelial corneal dystrophyH18.52 Epithelial (juvenile) corneal dystrophyH18.53 Granular corneal dystrophyH18.54 Lattice corneal dystrophyH18.55 Macular corneal dystrophyH18.59 Other hereditary corneal dystrophiesH18.6 KeratoconusH18.60 Keratoconus, unspecifiedH18.61 Keratoconus, stableH18.62 Keratoconus, unstableH18.7 Other and unspecified corneal deformitiesH18.71 Corneal ectasiaH18.72 Corneal staphylomaH18.73 DescemetoceleH18.79 Other corneal deformities

Billable codes in H18

CodeDescription
H18.001Unspecified corneal deposit, right eye
H18.002Unspecified corneal deposit, left eye
H18.003Unspecified corneal deposit, bilateral
H18.009Unspecified corneal deposit, unspecified eye
H18.011Anterior corneal pigmentations, right eye
H18.012Anterior corneal pigmentations, left eye
H18.013Anterior corneal pigmentations, bilateral
H18.019Anterior corneal pigmentations, unspecified eye
H18.021Argentous corneal deposits, right eye
H18.022Argentous corneal deposits, left eye
H18.023Argentous corneal deposits, bilateral
H18.029Argentous corneal deposits, unspecified eye
H18.031Corneal deposits in metabolic disorders, right eye
H18.032Corneal deposits in metabolic disorders, left eye
H18.033Corneal deposits in metabolic disorders, bilateral
H18.039Corneal deposits in metabolic disorders, unspecified eye
H18.041Kayser-Fleischer ring, right eye
H18.042Kayser-Fleischer ring, left eye
H18.043Kayser-Fleischer ring, bilateral
H18.049Kayser-Fleischer ring, unspecified eye
H18.051Posterior corneal pigmentations, right eye
H18.052Posterior corneal pigmentations, left eye
H18.053Posterior corneal pigmentations, bilateral
H18.059Posterior corneal pigmentations, unspecified eye
H18.061Stromal corneal pigmentations, right eye
H18.062Stromal corneal pigmentations, left eye
H18.063Stromal corneal pigmentations, bilateral
H18.069Stromal corneal pigmentations, unspecified eye
H18.10Bullous keratopathy, unspecified eye
H18.11Bullous keratopathy, right eye
H18.12Bullous keratopathy, left eye
H18.13Bullous keratopathy, bilateral
H18.20Unspecified corneal edema
H18.211Corneal edema secondary to contact lens, right eye
H18.212Corneal edema secondary to contact lens, left eye
H18.213Corneal edema secondary to contact lens, bilateral
H18.219Corneal edema secondary to contact lens, unspecified eye
H18.221Idiopathic corneal edema, right eye
H18.222Idiopathic corneal edema, left eye
H18.223Idiopathic corneal edema, bilateral
H18.229Idiopathic corneal edema, unspecified eye
H18.231Secondary corneal edema, right eye
H18.232Secondary corneal edema, left eye
H18.233Secondary corneal edema, bilateral
H18.239Secondary corneal edema, unspecified eye
H18.30Unspecified corneal membrane change
H18.311Folds and rupture in Bowman's membrane, right eye
H18.312Folds and rupture in Bowman's membrane, left eye
H18.313Folds and rupture in Bowman's membrane, bilateral
H18.319Folds and rupture in Bowman's membrane, unspecified eye
H18.321Folds in Descemet's membrane, right eye
H18.322Folds in Descemet's membrane, left eye
H18.323Folds in Descemet's membrane, bilateral
H18.329Folds in Descemet's membrane, unspecified eye
H18.331Rupture in Descemet's membrane, right eye
H18.332Rupture in Descemet's membrane, left eye
H18.333Rupture in Descemet's membrane, bilateral
H18.339Rupture in Descemet's membrane, unspecified eye
H18.40Unspecified corneal degeneration
H18.411Arcus senilis, right eye
H18.412Arcus senilis, left eye
H18.413Arcus senilis, bilateral
H18.419Arcus senilis, unspecified eye
H18.421Band keratopathy, right eye
H18.422Band keratopathy, left eye
H18.423Band keratopathy, bilateral
H18.429Band keratopathy, unspecified eye
H18.43Other calcerous corneal degeneration
H18.441Keratomalacia, right eye
H18.442Keratomalacia, left eye
H18.443Keratomalacia, bilateral
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
H18.503Unspecified hereditary corneal dystrophies, bilateral
H18.509Unspecified hereditary corneal dystrophies, unspecified eye
H18.511Endothelial corneal dystrophy, right eye
H18.512Endothelial corneal dystrophy, left eye
H18.513Endothelial corneal dystrophy, bilateral
H18.519Endothelial corneal dystrophy, unspecified eye
H18.521Epithelial (juvenile) corneal dystrophy, right eye
H18.522Epithelial (juvenile) corneal dystrophy, left eye
H18.523Epithelial (juvenile) corneal dystrophy, bilateral
H18.529Epithelial (juvenile) corneal dystrophy, unspecified eye
H18.531Granular corneal dystrophy, right eye
H18.532Granular corneal dystrophy, left eye
H18.533Granular corneal dystrophy, bilateral
H18.539Granular corneal dystrophy, unspecified eye
H18.541Lattice corneal dystrophy, right eye
H18.542Lattice corneal dystrophy, left eye
H18.543Lattice corneal dystrophy, bilateral
H18.549Lattice corneal dystrophy, unspecified eye
H18.551Macular corneal dystrophy, right eye
H18.552Macular corneal dystrophy, left eye
H18.553Macular corneal dystrophy, bilateral
H18.559Macular corneal dystrophy, unspecified eye
H18.591Other hereditary corneal dystrophies, right eye
H18.592Other hereditary corneal dystrophies, left eye
H18.593Other hereditary corneal dystrophies, bilateral
H18.599Other hereditary corneal dystrophies, unspecified eye
H18.601Keratoconus, unspecified, right eye
H18.602Keratoconus, unspecified, left eye
H18.603Keratoconus, unspecified, bilateral
H18.609Keratoconus, unspecified, unspecified eye
H18.611Keratoconus, stable, right eye
H18.612Keratoconus, stable, left eye
H18.613Keratoconus, stable, bilateral
H18.619Keratoconus, stable, unspecified eye
H18.621Keratoconus, unstable, right eye
H18.622Keratoconus, unstable, left eye
H18.623Keratoconus, unstable, bilateral
H18.629Keratoconus, unstable, unspecified eye
H18.70Unspecified corneal deformity
H18.711Corneal ectasia, right eye
H18.712Corneal ectasia, left eye
H18.713Corneal ectasia, bilateral
H18.719Corneal ectasia, unspecified eye
H18.721Corneal staphyloma, right eye
H18.722Corneal staphyloma, left eye
H18.723Corneal staphyloma, bilateral
H18.729Corneal staphyloma, unspecified eye
H18.731Descemetocele, right eye
H18.732Descemetocele, left eye
H18.733Descemetocele, bilateral
H18.739Descemetocele, unspecified eye
H18.791Other corneal deformities, right eye
H18.792Other corneal deformities, left eye
H18.793Other corneal deformities, bilateral
H18.799Other corneal deformities, unspecified eye
H18.811Anesthesia and hypoesthesia of cornea, right eye
H18.812Anesthesia and hypoesthesia of cornea, left eye
H18.813Anesthesia and hypoesthesia of cornea, bilateral
H18.819Anesthesia and hypoesthesia of cornea, unspecified eye
H18.821Corneal disorder due to contact lens, right eye
H18.822Corneal disorder due to contact lens, left eye
H18.823Corneal disorder due to contact lens, bilateral
H18.829Corneal disorder due to contact lens, unspecified eye
H18.831Recurrent erosion of cornea, right eye
H18.832Recurrent erosion of cornea, left eye
H18.833Recurrent erosion of cornea, bilateral
H18.839Recurrent erosion of cornea, unspecified eye
H18.891Other specified disorders of cornea, right eye
H18.892Other specified disorders of cornea, left eye
H18.893Other specified disorders of cornea, bilateral
H18.899Other specified disorders of cornea, unspecified eye
H18.9Unspecified disorder of cornea

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