H18.61Non-Billable (Header)Keratoconus, stableChild CodesH18.611Keratoconus, stable, right eyeH18.612Keratoconus, stable, left eyeH18.613Keratoconus, stable, bilateralH18.619Keratoconus, stable, unspecified eyeCode Hierarchy└H18Other disorders of cornea└H18.6Keratoconus└H18.61Keratoconus, stable└H18.61Keratoconus, stable