ICD-10-CM > H00-H59 > H15-H22 > H18 > H18.6 H18.6 Keratoconus Non-Billable/Non-Specific Codes H18.60Keratoconus, unspecifiedH18.601Keratoconus, unspecified, right eyeH18.602Keratoconus, unspecified, left eyeH18.603Keratoconus, unspecified, bilateralH18.609Keratoconus, unspecified, unspecified eyeH18.61Keratoconus, stableH18.611Keratoconus, stable, right eyeH18.612Keratoconus, stable, left eyeH18.613Keratoconus, stable, bilateralH18.619Keratoconus, stable, unspecified eyeH18.62Keratoconus, unstableH18.621Keratoconus, unstable, right eyeH18.622Keratoconus, unstable, left eyeH18.623Keratoconus, unstable, bilateralH18.629Keratoconus, unstable, unspecified eye