ICD-10 · PDGM grouping
H18 Other disorders of cornea
All 155 codes in the H18 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
155
Can lead a claim
116
Cannot lead a claim
39
What CMS assigns to H18
116 of the 155 codes group to MMTA - Other; 39 are assigned no clinical group. None of the 155 is assigned a comorbidity subgroup. 116 of the 155 can lead a claim.
Every code in H18
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| H18.0 Corneal pigmentations and deposits | ||||
| H18.00 Unspecified corneal deposit | ||||
| H18.001 | Unspecified corneal deposit, right eye | Can lead a claim | A | None |
| H18.002 | Unspecified corneal deposit, left eye | Can lead a claim | A | None |
| H18.003 | Unspecified corneal deposit, bilateral | Can lead a claim | A | None |
| H18.009 | Unspecified corneal deposit, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.01 Anterior corneal pigmentations | ||||
| H18.011 | Anterior corneal pigmentations, right eye | Can lead a claim | A | None |
| H18.012 | Anterior corneal pigmentations, left eye | Can lead a claim | A | None |
| H18.013 | Anterior corneal pigmentations, bilateral | Can lead a claim | A | None |
| H18.019 | Anterior corneal pigmentations, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.02 Argentous corneal deposits | ||||
| H18.021 | Argentous corneal deposits, right eye | Can lead a claim | A | None |
| H18.022 | Argentous corneal deposits, left eye | Can lead a claim | A | None |
| H18.023 | Argentous corneal deposits, bilateral | Can lead a claim | A | None |
| H18.029 | Argentous corneal deposits, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.03 Corneal deposits in metabolic disorders | ||||
| H18.031 | Corneal deposits in metabolic disorders, right eye | Can lead a claim | A | None |
| H18.032 | Corneal deposits in metabolic disorders, left eye | Can lead a claim | A | None |
| H18.033 | Corneal deposits in metabolic disorders, bilateral | Can lead a claim | A | None |
| H18.039 | Corneal deposits in metabolic disorders, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.04 Kayser-Fleischer ring | ||||
| H18.041 | Kayser-Fleischer ring, right eye | Can lead a claim | A | None |
| H18.042 | Kayser-Fleischer ring, left eye | Can lead a claim | A | None |
| H18.043 | Kayser-Fleischer ring, bilateral | Can lead a claim | A | None |
| H18.049 | Kayser-Fleischer ring, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.05 Posterior corneal pigmentations | ||||
| H18.051 | Posterior corneal pigmentations, right eye | Can lead a claim | A | None |
| H18.052 | Posterior corneal pigmentations, left eye | Can lead a claim | A | None |
| H18.053 | Posterior corneal pigmentations, bilateral | Can lead a claim | A | None |
| H18.059 | Posterior corneal pigmentations, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.06 Stromal corneal pigmentations | ||||
| H18.061 | Stromal corneal pigmentations, right eye | Can lead a claim | A | None |
| H18.062 | Stromal corneal pigmentations, left eye | Can lead a claim | A | None |
| H18.063 | Stromal corneal pigmentations, bilateral | Can lead a claim | A | None |
| H18.069 | Stromal corneal pigmentations, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.1 Bullous keratopathy | ||||
| H18.10 | Bullous keratopathy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.11 | Bullous keratopathy, right eye | Can lead a claim | A | None |
| H18.12 | Bullous keratopathy, left eye | Can lead a claim | A | None |
| H18.13 | Bullous keratopathy, bilateral | Can lead a claim | A | None |
| H18.2 Other and unspecified corneal edema | ||||
| H18.20 | Unspecified corneal edema | Can lead a claim | A | None |
| H18.21 Corneal edema secondary to contact lens | ||||
| H18.211 | Corneal edema secondary to contact lens, right eye | Can lead a claim | A | None |
| H18.212 | Corneal edema secondary to contact lens, left eye | Can lead a claim | A | None |
| H18.213 | Corneal edema secondary to contact lens, bilateral | Can lead a claim | A | None |
| H18.219 | Corneal edema secondary to contact lens, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.22 Idiopathic corneal edema | ||||
| H18.221 | Idiopathic corneal edema, right eye | Can lead a claim | A | None |
| H18.222 | Idiopathic corneal edema, left eye | Can lead a claim | A | None |
| H18.223 | Idiopathic corneal edema, bilateral | Can lead a claim | A | None |
| H18.229 | Idiopathic corneal edema, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.23 Secondary corneal edema | ||||
| H18.231 | Secondary corneal edema, right eye | Can lead a claim | A | None |
| H18.232 | Secondary corneal edema, left eye | Can lead a claim | A | None |
| H18.233 | Secondary corneal edema, bilateral | Can lead a claim | A | None |
| H18.239 | Secondary corneal edema, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.3 Changes of corneal membranes | ||||
| H18.30 | Unspecified corneal membrane change | Can lead a claim | A | None |
| H18.31 Folds and rupture in Bowman's membrane | ||||
| H18.311 | Folds and rupture in Bowman's membrane, right eye | Can lead a claim | A | None |
| H18.312 | Folds and rupture in Bowman's membrane, left eye | Can lead a claim | A | None |
| H18.313 | Folds and rupture in Bowman's membrane, bilateral | Can lead a claim | A | None |
| H18.319 | Folds and rupture in Bowman's membrane, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.32 Folds in Descemet's membrane | ||||
| H18.321 | Folds in Descemet's membrane, right eye | Can lead a claim | A | None |
| H18.322 | Folds in Descemet's membrane, left eye | Can lead a claim | A | None |
| H18.323 | Folds in Descemet's membrane, bilateral | Can lead a claim | A | None |
| H18.329 | Folds in Descemet's membrane, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.33 Rupture in Descemet's membrane | ||||
| H18.331 | Rupture in Descemet's membrane, right eye | Can lead a claim | A | None |
| H18.332 | Rupture in Descemet's membrane, left eye | Can lead a claim | A | None |
| H18.333 | Rupture in Descemet's membrane, bilateral | Can lead a claim | A | None |
| H18.339 | Rupture in Descemet's membrane, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.4 Corneal degeneration | ||||
| H18.40 | Unspecified corneal degeneration | Can lead a claim | A | None |
| H18.41 Arcus senilis | ||||
| H18.411 | Arcus senilis, right eye | Can lead a claim | A | None |
| H18.412 | Arcus senilis, left eye | Can lead a claim | A | None |
| H18.413 | Arcus senilis, bilateral | Can lead a claim | A | None |
| H18.419 | Arcus senilis, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.42 Band keratopathy | ||||
| H18.421 | Band keratopathy, right eye | Can lead a claim | A | None |
| H18.422 | Band keratopathy, left eye | Can lead a claim | A | None |
| H18.423 | Band keratopathy, bilateral | Can lead a claim | A | None |
| H18.429 | Band keratopathy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.43 | Other calcerous corneal degeneration | Can lead a claim | A | None |
| H18.44 Keratomalacia | ||||
| H18.441 | Keratomalacia, right eye | Can lead a claim | A | None |
| H18.442 | Keratomalacia, left eye | Can lead a claim | A | None |
| H18.443 | Keratomalacia, bilateral | Can lead a claim | A | None |
| H18.449 | Keratomalacia, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.45 Nodular corneal degeneration | ||||
| H18.451 | Nodular corneal degeneration, right eye | Can lead a claim | A | None |
| H18.452 | Nodular corneal degeneration, left eye | Can lead a claim | A | None |
| H18.453 | Nodular corneal degeneration, bilateral | Can lead a claim | A | None |
| H18.459 | Nodular corneal degeneration, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.46 Peripheral corneal degeneration | ||||
| H18.461 | Peripheral corneal degeneration, right eye | Can lead a claim | A | None |
| H18.462 | Peripheral corneal degeneration, left eye | Can lead a claim | A | None |
| H18.463 | Peripheral corneal degeneration, bilateral | Can lead a claim | A | None |
| H18.469 | Peripheral corneal degeneration, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.49 | Other corneal degeneration | Can lead a claim | A | None |
| H18.5 Hereditary corneal dystrophies | ||||
| H18.50 Unspecified hereditary corneal dystrophies | ||||
| H18.501 | Unspecified hereditary corneal dystrophies, right eye | Can lead a claim | A | None |
| H18.502 | Unspecified hereditary corneal dystrophies, left eye | Can lead a claim | A | None |
| H18.503 | Unspecified hereditary corneal dystrophies, bilateral | Can lead a claim | A | None |
| H18.509 | Unspecified hereditary corneal dystrophies, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.51 Endothelial corneal dystrophy | ||||
| H18.511 | Endothelial corneal dystrophy, right eye | Can lead a claim | A | None |
| H18.512 | Endothelial corneal dystrophy, left eye | Can lead a claim | A | None |
| H18.513 | Endothelial corneal dystrophy, bilateral | Can lead a claim | A | None |
| H18.519 | Endothelial corneal dystrophy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.52 Epithelial (juvenile) corneal dystrophy | ||||
| H18.521 | Epithelial (juvenile) corneal dystrophy, right eye | Can lead a claim | A | None |
| H18.522 | Epithelial (juvenile) corneal dystrophy, left eye | Can lead a claim | A | None |
| H18.523 | Epithelial (juvenile) corneal dystrophy, bilateral | Can lead a claim | A | None |
| H18.529 | Epithelial (juvenile) corneal dystrophy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.53 Granular corneal dystrophy | ||||
| H18.531 | Granular corneal dystrophy, right eye | Can lead a claim | A | None |
| H18.532 | Granular corneal dystrophy, left eye | Can lead a claim | A | None |
| H18.533 | Granular corneal dystrophy, bilateral | Can lead a claim | A | None |
| H18.539 | Granular corneal dystrophy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.54 Lattice corneal dystrophy | ||||
| H18.541 | Lattice corneal dystrophy, right eye | Can lead a claim | A | None |
| H18.542 | Lattice corneal dystrophy, left eye | Can lead a claim | A | None |
| H18.543 | Lattice corneal dystrophy, bilateral | Can lead a claim | A | None |
| H18.549 | Lattice corneal dystrophy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.55 Macular corneal dystrophy | ||||
| H18.551 | Macular corneal dystrophy, right eye | Can lead a claim | A | None |
| H18.552 | Macular corneal dystrophy, left eye | Can lead a claim | A | None |
| H18.553 | Macular corneal dystrophy, bilateral | Can lead a claim | A | None |
| H18.559 | Macular corneal dystrophy, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.59 Other hereditary corneal dystrophies | ||||
| H18.591 | Other hereditary corneal dystrophies, right eye | Can lead a claim | A | None |
| H18.592 | Other hereditary corneal dystrophies, left eye | Can lead a claim | A | None |
| H18.593 | Other hereditary corneal dystrophies, bilateral | Can lead a claim | A | None |
| H18.599 | Other hereditary corneal dystrophies, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.6 Keratoconus | ||||
| H18.60 Keratoconus, unspecified | ||||
| H18.601 | Keratoconus, unspecified, right eye | Can lead a claim | A | None |
| H18.602 | Keratoconus, unspecified, left eye | Can lead a claim | A | None |
| H18.603 | Keratoconus, unspecified, bilateral | Can lead a claim | A | None |
| H18.609 | Keratoconus, unspecified, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.61 Keratoconus, stable | ||||
| H18.611 | Keratoconus, stable, right eye | Can lead a claim | A | None |
| H18.612 | Keratoconus, stable, left eye | Can lead a claim | A | None |
| H18.613 | Keratoconus, stable, bilateral | Can lead a claim | A | None |
| H18.619 | Keratoconus, stable, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.62 Keratoconus, unstable | ||||
| H18.621 | Keratoconus, unstable, right eye | Can lead a claim | A | None |
| H18.622 | Keratoconus, unstable, left eye | Can lead a claim | A | None |
| H18.623 | Keratoconus, unstable, bilateral | Can lead a claim | A | None |
| H18.629 | Keratoconus, unstable, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.7 Other and unspecified corneal deformities | ||||
| H18.70 | Unspecified corneal deformity | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.71 Corneal ectasia | ||||
| H18.711 | Corneal ectasia, right eye | Can lead a claim | A | None |
| H18.712 | Corneal ectasia, left eye | Can lead a claim | A | None |
| H18.713 | Corneal ectasia, bilateral | Can lead a claim | A | None |
| H18.719 | Corneal ectasia, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.72 Corneal staphyloma | ||||
| H18.721 | Corneal staphyloma, right eye | Can lead a claim | A | None |
| H18.722 | Corneal staphyloma, left eye | Can lead a claim | A | None |
| H18.723 | Corneal staphyloma, bilateral | Can lead a claim | A | None |
| H18.729 | Corneal staphyloma, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.73 Descemetocele | ||||
| H18.731 | Descemetocele, right eye | Can lead a claim | A | None |
| H18.732 | Descemetocele, left eye | Can lead a claim | A | None |
| H18.733 | Descemetocele, bilateral | Can lead a claim | A | None |
| H18.739 | Descemetocele, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.79 Other corneal deformities | ||||
| H18.791 | Other corneal deformities, right eye | Can lead a claim | A | None |
| H18.792 | Other corneal deformities, left eye | Can lead a claim | A | None |
| H18.793 | Other corneal deformities, bilateral | Can lead a claim | A | None |
| H18.799 | Other corneal deformities, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.8 Other specified disorders of cornea | ||||
| H18.81 Anesthesia and hypoesthesia of cornea | ||||
| H18.811 | Anesthesia and hypoesthesia of cornea, right eye | Can lead a claim | A | None |
| H18.812 | Anesthesia and hypoesthesia of cornea, left eye | Can lead a claim | A | None |
| H18.813 | Anesthesia and hypoesthesia of cornea, bilateral | Can lead a claim | A | None |
| H18.819 | Anesthesia and hypoesthesia of cornea, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.82 Corneal disorder due to contact lens | ||||
| H18.821 | Corneal disorder due to contact lens, right eye | Can lead a claim | A | None |
| H18.822 | Corneal disorder due to contact lens, left eye | Can lead a claim | A | None |
| H18.823 | Corneal disorder due to contact lens, bilateral | Can lead a claim | A | None |
| H18.829 | Corneal disorder due to contact lens, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.83 Recurrent erosion of cornea | ||||
| H18.831 | Recurrent erosion of cornea, right eye | Can lead a claim | A | None |
| H18.832 | Recurrent erosion of cornea, left eye | Can lead a claim | A | None |
| H18.833 | Recurrent erosion of cornea, bilateral | Can lead a claim | A | None |
| H18.839 | Recurrent erosion of cornea, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.89 Other specified disorders of cornea | ||||
| H18.891 | Other specified disorders of cornea, right eye | Can lead a claim | A | None |
| H18.892 | Other specified disorders of cornea, left eye | Can lead a claim | A | None |
| H18.893 | Other specified disorders of cornea, bilateral | Can lead a claim | A | None |
| H18.899 | Other specified disorders of cornea, unspecified eye | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| H18.9 | Unspecified disorder of cornea | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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