DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

H18 Other disorders of cornea

  • Header · not billable

H18 is not billable. The category heads 155 billable codes in FY2027, grouped under 10 subdivisions.

Index → code

Where it sits

  1. Chapter 7 Diseases of the eye and adnexa (H00-H59)
  2. H15-H22 Disorders of sclera, cornea, iris and ciliary body (H15-H22)
  3. H18 Other disorders of cornea
Billable codes
155
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
62

Codes in H18

  1. H18.0
    Corneal pigmentations and deposits
    Header
  2. H18.00
    Unspecified corneal deposit
    Header
  3. H18.001
    Unspecified corneal deposit, right eye
    Billable
  4. H18.002
    Unspecified corneal deposit, left eye
    Billable
  5. H18.003
    Unspecified corneal deposit, bilateral
    Billable
  6. H18.009
    Unspecified corneal deposit, unspecified eye
    Billable
  7. H18.01
    Anterior corneal pigmentations
    Header
    Inclusion terms 1

    Inclusion terms

    • Staehli's line
  8. H18.011
    Anterior corneal pigmentations, right eye
    Billable
  9. H18.012
    Anterior corneal pigmentations, left eye
    Billable
  10. H18.013
    Anterior corneal pigmentations, bilateral
    Billable
  11. H18.019
    Anterior corneal pigmentations, unspecified eye
    Billable
  12. H18.02
    Argentous corneal deposits
    Header
  13. H18.021
    Argentous corneal deposits, right eye
    Billable
  14. H18.022
    Argentous corneal deposits, left eye
    Billable
  15. H18.023
    Argentous corneal deposits, bilateral
    Billable
  16. H18.029
    Argentous corneal deposits, unspecified eye
    Billable
  17. H18.03
    Corneal deposits in metabolic disorders
    Header
    Code also 1

    Code also

    • associated metabolic disorder
  18. H18.031
    Corneal deposits in metabolic disorders, right eye
    Billable
  19. H18.032
    Corneal deposits in metabolic disorders, left eye
    Billable
  20. H18.033
    Corneal deposits in metabolic disorders, bilateral
    Billable
  21. H18.039
    Corneal deposits in metabolic disorders, unspecified eye
    Billable
  22. H18.04
    Kayser-Fleischer ring
    Header
    Code also 1

    Code also

    • associated Wilson's disease (E83.01) E83.01
  23. H18.041
    Kayser-Fleischer ring, right eye
    Billable
  24. H18.042
    Kayser-Fleischer ring, left eye
    Billable
  25. H18.043
    Kayser-Fleischer ring, bilateral
    Billable
  26. H18.049
    Kayser-Fleischer ring, unspecified eye
    Billable
  27. H18.05
    Posterior corneal pigmentations
    Header
    Inclusion terms 1

    Inclusion terms

    • Krukenberg's spindle
  28. H18.051
    Posterior corneal pigmentations, right eye
    Billable
  29. H18.052
    Posterior corneal pigmentations, left eye
    Billable
  30. H18.053
    Posterior corneal pigmentations, bilateral
    Billable
  31. H18.059
    Posterior corneal pigmentations, unspecified eye
    Billable
  32. H18.06
    Stromal corneal pigmentations
    Header
    Inclusion terms 1

    Inclusion terms

    • Hematocornea
  33. H18.061
    Stromal corneal pigmentations, right eye
    Billable
  34. H18.062
    Stromal corneal pigmentations, left eye
    Billable
  35. H18.063
    Stromal corneal pigmentations, bilateral
    Billable
  36. H18.069
    Stromal corneal pigmentations, unspecified eye
    Billable
  37. H18.1
    Bullous keratopathy
    Header
  38. H18.10
    Bullous keratopathy, unspecified eye
    Billable
  39. H18.11
    Bullous keratopathy, right eye
    Billable
  40. H18.12
    Bullous keratopathy, left eye
    Billable
  41. H18.13
    Bullous keratopathy, bilateral
    Billable
  42. H18.2
    Other and unspecified corneal edema
    Header
  43. H18.20
    Unspecified corneal edema
    Billable
  44. H18.21
    Corneal edema secondary to contact lens
    Header
    Excludes2 1

    Excludes2

    • other corneal disorders due to contact lens (H18.82-) H18.82
  45. H18.211
    Corneal edema secondary to contact lens, right eye
    Billable
  46. H18.212
    Corneal edema secondary to contact lens, left eye
    Billable
  47. H18.213
    Corneal edema secondary to contact lens, bilateral
    Billable
  48. H18.219
    Corneal edema secondary to contact lens, unspecified eye
    Billable
  49. H18.22
    Idiopathic corneal edema
    Header
  50. H18.221
    Idiopathic corneal edema, right eye
    Billable
  51. H18.222
    Idiopathic corneal edema, left eye
    Billable
  52. H18.223
    Idiopathic corneal edema, bilateral
    Billable
  53. H18.229
    Idiopathic corneal edema, unspecified eye
    Billable
  54. H18.23
    Secondary corneal edema
    Header
  55. H18.231
    Secondary corneal edema, right eye
    Billable
  56. H18.232
    Secondary corneal edema, left eye
    Billable
  57. H18.233
    Secondary corneal edema, bilateral
    Billable
  58. H18.239
    Secondary corneal edema, unspecified eye
    Billable
  59. H18.3
    Changes of corneal membranes
    Header
  60. H18.30
    Unspecified corneal membrane change
    Billable
  61. H18.31
    Folds and rupture in Bowman's membrane
    Header
  62. H18.311
    Folds and rupture in Bowman's membrane, right eye
    Billable
  63. H18.312
    Folds and rupture in Bowman's membrane, left eye
    Billable
  64. H18.313
    Folds and rupture in Bowman's membrane, bilateral
    Billable
  65. H18.319
    Folds and rupture in Bowman's membrane, unspecified eye
    Billable
  66. H18.32
    Folds in Descemet's membrane
    Header
  67. H18.321
    Folds in Descemet's membrane, right eye
    Billable
  68. H18.322
    Folds in Descemet's membrane, left eye
    Billable
  69. H18.323
    Folds in Descemet's membrane, bilateral
    Billable
  70. H18.329
    Folds in Descemet's membrane, unspecified eye
    Billable
  71. H18.33
    Rupture in Descemet's membrane
    Header
  72. H18.331
    Rupture in Descemet's membrane, right eye
    Billable
  73. H18.332
    Rupture in Descemet's membrane, left eye
    Billable
  74. H18.333
    Rupture in Descemet's membrane, bilateral
    Billable
  75. H18.339
    Rupture in Descemet's membrane, unspecified eye
    Billable
  76. H18.4
    Corneal degeneration
    Header
    Excludes1 2

    Excludes1

    • Mooren's ulcer (H16.0-) H16.0
    • recurrent erosion of cornea (H18.83-) H18.83
  77. H18.40
    Unspecified corneal degeneration
    Billable
  78. H18.41
    Arcus senilis
    Header
    Inclusion terms 1

    Inclusion terms

    • Senile corneal changes
  79. H18.411
    Arcus senilis, right eye
    Billable
  80. H18.412
    Arcus senilis, left eye
    Billable
  81. H18.413
    Arcus senilis, bilateral
    Billable
  82. H18.419
    Arcus senilis, unspecified eye
    Billable
  83. H18.42
    Band keratopathy
    Header
  84. H18.421
    Band keratopathy, right eye
    Billable
  85. H18.422
    Band keratopathy, left eye
    Billable
  86. H18.423
    Band keratopathy, bilateral
    Billable
  87. H18.429
    Band keratopathy, unspecified eye
    Billable
  88. H18.43
    Other calcerous corneal degeneration
    Billable
  89. H18.44
    Keratomalacia
    Header
    Excludes1 1

    Excludes1

    • keratomalacia due to vitamin A deficiency (E50.4) E50.4
  90. H18.441
    Keratomalacia, right eye
    Billable
  91. H18.442
    Keratomalacia, left eye
    Billable
  92. H18.443
    Keratomalacia, bilateral
    Billable
  93. H18.449
    Keratomalacia, unspecified eye
    Billable
  94. H18.45
    Nodular corneal degeneration
    Header
  95. H18.451
    Nodular corneal degeneration, right eye
    Billable
  96. H18.452
    Nodular corneal degeneration, left eye
    Billable
  97. H18.453
    Nodular corneal degeneration, bilateral
    Billable
  98. H18.459
    Nodular corneal degeneration, unspecified eye
    Billable
  99. H18.46
    Peripheral corneal degeneration
    Header
  100. H18.461
    Peripheral corneal degeneration, right eye
    Billable
  101. H18.462
    Peripheral corneal degeneration, left eye
    Billable
  102. H18.463
    Peripheral corneal degeneration, bilateral
    Billable
  103. H18.469
    Peripheral corneal degeneration, unspecified eye
    Billable
  104. H18.49
    Other corneal degeneration
    Billable
  105. H18.5
    Hereditary corneal dystrophies
    Header
  106. H18.50
    Unspecified hereditary corneal dystrophies
    Header
  107. H18.501
    Unspecified hereditary corneal dystrophies, right eye
    Billable
  108. H18.502
    Unspecified hereditary corneal dystrophies, left eye
    Billable
  109. H18.503
    Unspecified hereditary corneal dystrophies, bilateral
    Billable
  110. H18.509
    Unspecified hereditary corneal dystrophies, unspecified eye
    Billable
  111. H18.51
    Endothelial corneal dystrophy
    Header
    Inclusion terms 1

    Inclusion terms

    • Fuchs' dystrophy
  112. H18.511
    Endothelial corneal dystrophy, right eye
    Billable
  113. H18.512
    Endothelial corneal dystrophy, left eye
    Billable
  114. H18.513
    Endothelial corneal dystrophy, bilateral
    Billable
  115. H18.519
    Endothelial corneal dystrophy, unspecified eye
    Billable
  116. H18.52
    Epithelial (juvenile) corneal dystrophy
    Header
  117. H18.521
    Epithelial (juvenile) corneal dystrophy, right eye
    Billable
  118. H18.522
    Epithelial (juvenile) corneal dystrophy, left eye
    Billable
  119. H18.523
    Epithelial (juvenile) corneal dystrophy, bilateral
    Billable
  120. H18.529
    Epithelial (juvenile) corneal dystrophy, unspecified eye
    Billable
  121. H18.53
    Granular corneal dystrophy
    Header
  122. H18.531
    Granular corneal dystrophy, right eye
    Billable
  123. H18.532
    Granular corneal dystrophy, left eye
    Billable
  124. H18.533
    Granular corneal dystrophy, bilateral
    Billable
  125. H18.539
    Granular corneal dystrophy, unspecified eye
    Billable
  126. H18.54
    Lattice corneal dystrophy
    Header
  127. H18.541
    Lattice corneal dystrophy, right eye
    Billable
  128. H18.542
    Lattice corneal dystrophy, left eye
    Billable
  129. H18.543
    Lattice corneal dystrophy, bilateral
    Billable
  130. H18.549
    Lattice corneal dystrophy, unspecified eye
    Billable
  131. H18.55
    Macular corneal dystrophy
    Header
  132. H18.551
    Macular corneal dystrophy, right eye
    Billable
  133. H18.552
    Macular corneal dystrophy, left eye
    Billable
  134. H18.553
    Macular corneal dystrophy, bilateral
    Billable
  135. H18.559
    Macular corneal dystrophy, unspecified eye
    Billable
  136. H18.59
    Other hereditary corneal dystrophies
    Header
  137. H18.591
    Other hereditary corneal dystrophies, right eye
    Billable
  138. H18.592
    Other hereditary corneal dystrophies, left eye
    Billable
  139. H18.593
    Other hereditary corneal dystrophies, bilateral
    Billable
  140. H18.599
    Other hereditary corneal dystrophies, unspecified eye
    Billable
  141. H18.6
    Keratoconus
    Header
  142. H18.60
    Keratoconus, unspecified
    Header
  143. H18.601
    Keratoconus, unspecified, right eye
    Billable
  144. H18.602
    Keratoconus, unspecified, left eye
    Billable
  145. H18.603
    Keratoconus, unspecified, bilateral
    Billable
  146. H18.609
    Keratoconus, unspecified, unspecified eye
    Billable
  147. H18.61
    Keratoconus, stable
    Header
  148. H18.611
    Keratoconus, stable, right eye
    Billable
  149. H18.612
    Keratoconus, stable, left eye
    Billable
  150. H18.613
    Keratoconus, stable, bilateral
    Billable
  151. H18.619
    Keratoconus, stable, unspecified eye
    Billable
  152. H18.62
    Keratoconus, unstable
    Header
    Inclusion terms 1

    Inclusion terms

    • Acute hydrops
  153. H18.621
    Keratoconus, unstable, right eye
    Billable
  154. H18.622
    Keratoconus, unstable, left eye
    Billable
  155. H18.623
    Keratoconus, unstable, bilateral
    Billable
  156. H18.629
    Keratoconus, unstable, unspecified eye
    Billable
  157. H18.7
    Other and unspecified corneal deformities
    Header
    Excludes1 1

    Excludes1

    • congenital malformations of cornea (Q13.3-Q13.4) Q13.3 Q13.4
  158. H18.70
    Unspecified corneal deformity
    Billable
  159. H18.71
    Corneal ectasia
    Header
  160. H18.711
    Corneal ectasia, right eye
    Billable
  161. H18.712
    Corneal ectasia, left eye
    Billable
  162. H18.713
    Corneal ectasia, bilateral
    Billable
  163. H18.719
    Corneal ectasia, unspecified eye
    Billable
  164. H18.72
    Corneal staphyloma
    Header
  165. H18.721
    Corneal staphyloma, right eye
    Billable
  166. H18.722
    Corneal staphyloma, left eye
    Billable
  167. H18.723
    Corneal staphyloma, bilateral
    Billable
  168. H18.729
    Corneal staphyloma, unspecified eye
    Billable
  169. H18.73
    Descemetocele
    Header
  170. H18.731
    Descemetocele, right eye
    Billable
  171. H18.732
    Descemetocele, left eye
    Billable
  172. H18.733
    Descemetocele, bilateral
    Billable
  173. H18.739
    Descemetocele, unspecified eye
    Billable
  174. H18.79
    Other corneal deformities
    Header
  175. H18.791
    Other corneal deformities, right eye
    Billable
  176. H18.792
    Other corneal deformities, left eye
    Billable
  177. H18.793
    Other corneal deformities, bilateral
    Billable
  178. H18.799
    Other corneal deformities, unspecified eye
    Billable
  179. H18.8
    Other specified disorders of cornea
    Header
  180. H18.81
    Anesthesia and hypoesthesia of cornea
    Header
  181. H18.811
    Anesthesia and hypoesthesia of cornea, right eye
    Billable
  182. H18.812
    Anesthesia and hypoesthesia of cornea, left eye
    Billable
  183. H18.813
    Anesthesia and hypoesthesia of cornea, bilateral
    Billable
  184. H18.819
    Anesthesia and hypoesthesia of cornea, unspecified eye
    Billable
  185. H18.82
    Corneal disorder due to contact lens
    Header
    Excludes2 1

    Excludes2

    • corneal edema due to contact lens (H18.21-) H18.21
  186. H18.821
    Corneal disorder due to contact lens, right eye
    Billable
  187. H18.822
    Corneal disorder due to contact lens, left eye
    Billable
  188. H18.823
    Corneal disorder due to contact lens, bilateral
    Billable
  189. H18.829
    Corneal disorder due to contact lens, unspecified eye
    Billable
  190. H18.83
    Recurrent erosion of cornea
    Header
  191. H18.831
    Recurrent erosion of cornea, right eye
    Billable
  192. H18.832
    Recurrent erosion of cornea, left eye
    Billable
  193. H18.833
    Recurrent erosion of cornea, bilateral
    Billable
  194. H18.839
    Recurrent erosion of cornea, unspecified eye
    Billable
  195. H18.89
    Other specified disorders of cornea
    Header
  196. H18.891
    Other specified disorders of cornea, right eye
    Billable
  197. H18.892
    Other specified disorders of cornea, left eye
    Billable
  198. H18.893
    Other specified disorders of cornea, bilateral
    Billable
  199. H18.899
    Other specified disorders of cornea, unspecified eye
    Billable
  200. H18.9
    Unspecified disorder of cornea
    Billable

Sources of each column.

Instructions

Notes that also apply

Chapter 7 instructions (Notes 1, Excludes2 11): printed on the chapter 7 page.

Index entries

  • Fleischer (-Kayser) ring (cornea) → H18.04-
  • Kayser-Fleischer ring (cornea) (pseudosclerosis) → H18.04-
  • Keratomalacia → H18.44-
  • Hassal-Henle bodies or warts (cornea) → H18.49
  • Keratoconus → H18.60-
  • Descemetocele → H18.73-
  • Keratoglobus → H18.79
  • Keratopathy → H18.9
  • Depositcornea → H18.00-
  • Pigmentation (abnormal) (anomaly)cornea (anterior) → H18.01-
  • Ring(s)Fleischer's (cornea) → H18.04-
  • Ring(s)Kayser-Fleischer (cornea) → H18.04-
  • Keratopathybullous → H18.1-
  • Edema, edematous (infectious) (pitting) (toxic)cornea → H18.2-
  • Change(s) (in) (of)corneal membrane → H18.30
  • Degeneration, degenerativecornea → H18.40
  • Keratopathyband → H18.42-
  • Wart (due to HPV) (filiform) (infectious) (viral)Hassal-Henle's (of cornea) → H18.49
  • Dystrophy, dystrophiacornea (hereditary) → H18.50-
  • Dystrophy, dystrophiaFuchs' → H18.51-
  • Fuchs'dystrophy (corneal endothelium) → H18.51-
  • Keratoconusstable → H18.61-
  • Keratoconusunstable → H18.62-
  • Deformitycornea (acquired) → H18.70
  • Ectasia, ectasiscornea → H18.71-
  • Staphyloma (sclera)cornea → H18.72-
  • Anesthesia, anestheticcornea → H18.81-
  • Cyst (colloid) (mucous) (simple) (retention)cornea → H18.89-
  • Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)cornea → H18.89-
  • Necrosis, necrotic (ischemic)cornea → H18.89-
  • Xerosiscornea → H18.89-
  • Disease, diseasedcornea → H18.9
  • Disorder (of)cornea → H18.9
  • Depositcorneaargentous → H18.02-
  • Depositcorneadue to metabolic disorder → H18.03-
  • DepositcorneaKayser-Fleischer ring → H18.04-
  • Pigmentation (abnormal) (anomaly)cornea (anterior)posterior → H18.05-
  • Pigmentation (abnormal) (anomaly)cornea (anterior)stromal → H18.06-
  • Edema, edematous (infectious) (pitting) (toxic)corneaidiopathic → H18.22-
  • Edema, edematous (infectious) (pitting) (toxic)corneasecondary → H18.23-

22 more, longer entries are not listed; the search box finds them by word.

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