H18.4 — Corneal degeneration
Is H18.4 billable?
No — H18.4 is a non-billable header code. H18.4 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 23 billable codes beneath H18.4.
Billable codes under this header
- H18.40Unspecified corneal degeneration
- H18.43Other calcerous corneal degeneration
- H18.49Other corneal degeneration
- H18.411Arcus senilis, right eye
- H18.412Arcus senilis, left eye
- H18.413Arcus senilis, bilateral
- H18.419Arcus senilis, unspecified eye
- H18.421Band keratopathy, right eye
- H18.422Band keratopathy, left eye
- H18.423Band keratopathy, bilateral
- H18.429Band keratopathy, unspecified eye
- H18.441Keratomalacia, right eye
- H18.442Keratomalacia, left eye
- H18.443Keratomalacia, bilateral
- H18.449Keratomalacia, unspecified eye
- H18.451Nodular corneal degeneration, right eye
- H18.452Nodular corneal degeneration, left eye
- H18.453Nodular corneal degeneration, bilateral
- H18.459Nodular corneal degeneration, unspecified eye
- H18.461Peripheral corneal degeneration, right eye
- H18.462Peripheral corneal degeneration, left eye
- H18.463Peripheral corneal degeneration, bilateral
- H18.469Peripheral corneal degeneration, unspecified eye
H18.4 at a glance
| Code | H18.4 |
|---|---|
| Description | Corneal degeneration |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with H18.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 7
The conditions below are not part of H18.4, but a patient may have both at the same time. When documentation supports it, H18.4 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury (trauma) of eye and orbit (S05.-)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
What codes fall under H18.4? (8)
- H18.40Unspecified corneal degeneration
- H18.41Arcus senilisnot billable
- H18.42Band keratopathynot billable
- H18.43Other calcerous corneal degeneration
- H18.44Keratomalacianot billable
- H18.45Nodular corneal degenerationnot billable
- H18.46Peripheral corneal degenerationnot billable
- H18.49Other corneal degeneration
How long has H18.4 existed?
H18.4 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
What other codes are in the H18 family? (9)
- H18.0Corneal pigmentations and depositsnot billable
- H18.1Bullous keratopathynot billable
- H18.2Other and unspecified corneal edemanot billable
- H18.3Changes of corneal membranesnot billable
- H18.5Hereditary corneal dystrophiesnot billable
- H18.6Keratoconusnot billable
- H18.7Other and unspecified corneal deformitiesnot billable
- H18.8Other specified disorders of corneanot billable
- H18.9Unspecified disorder of cornea