Valid for Submission
H18.40 is a billable diagnosis code used to specify a medical diagnosis of unspecified corneal degeneration. The code H18.40 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code H18.40 might also be used to specify conditions or terms like corneal degeneration, corneal epithelial degeneration, corneal stromal degeneration, degeneration of cornea of bilateral eyes, degeneration of cornea of left eye , degeneration of cornea of right eye, etc.
Unspecified diagnosis codes like H18.40 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H18.40 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Corneal degeneration
- Corneal epithelial degeneration
- Corneal stromal degeneration
- Degeneration of cornea of bilateral eyes
- Degeneration of cornea of left eye
- Degeneration of cornea of right eye
Diagnostic Related Groups - MS-DRG Mapping
Convert H18.40 to ICD-9 Code
Information for Patients
Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.
Problems with the cornea include
- Refractive errors
- Dystrophies - conditions in which parts of the cornea lose clarity due to a buildup of cloudy material
Treatments of corneal disorders include medicines, corneal transplantation, and corneal laser surgery.
NIH: National Eye Institute
- Cloudy cornea (Medical Encyclopedia)
- Corneal injury (Medical Encyclopedia)
- Corneal transplant (Medical Encyclopedia)
- Corneal ulcers and infections (Medical Encyclopedia)
- Fuchs dystrophy (Medical Encyclopedia)
- Keratoconus (Medical Encyclopedia)
[Learn More in MedlinePlus]