H18
Other disorders of cornea
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 11 never code together
H00-H59chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)E09.3-E10.3-E11.3-E13.3-
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury (trauma) of eye and orbit (S05.-)S05.-
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)A50.01A50.3-A51.43A52.71
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
H00-H59chapter
Notes
- Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
Index entries leading here filed at null
No alphabetic index entry points at this code.
Subordinate codes 10
H18.0 Corneal pigmentations and deposits H18.1 Bullous keratopathy H18.2 Other and unspecified corneal edema H18.3 Changes of corneal membranes H18.4 Corneal degeneration H18.5 Hereditary corneal dystrophies H18.6 Keratoconus H18.7 Other and unspecified corneal deformities H18.8 Other specified disorders of cornea H18.9 Unspecified disorder of cornea
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.