2026 ICD-10-CM Diagnosis Code H18.899Other specified disorders of cornea, unspecified eye
ICD-10-CM Codes›H00–H59›H15-H22›H18
- Billable — Valid for Submission
- Not Chronic
H18.899 is a billable ICD-10-CM diagnosis code for other specified disorders of cornea, unspecified eye. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Benign neoplasm of cornea
- Blister to cornea
- Central corneal epithelial staining pattern
- Chrysiasis of cornea
- Clear corneal incision
- Clouding of corneal stroma
- Coats' white ring
- Complication of laser surgery
- Complication of refractive keratoplasty by laser surgery
- Cornea stromal loss
- Corneal central stromal loss
- Corneal decompensation
- Corneal dendrite
- Corneal endothelial plaque
- Corneal epithelial defect
- Corneal epithelial defect following penetrating keratoplasty
- Corneal epithelial dots
- Corneal epithelial fingerprint lines
- Corneal epithelial ingrowth
- Corneal epithelial lines
- Corneal epithelial map lines
- Corneal epithelial staining finding
- Corneal epithelial vesicles
- Corneal epithelium loose
- Corneal exposure
- Corneal fibrosis
- Corneal filament
- Corneal hemorrhage
- Corneal hypoxia
- Corneal immune ring
- Corneal incision intact
- Corneal infection
- Corneal iron deposits
- Corneal melting disorder
- Corneal nerve finding
- Corneal nerves inflamed
- Corneal nerves thickened
- Corneal peripheral stromal loss
- Corneal stromal wrinkles
- Corneal suture in place
- Corneal thinning
- Corneal warpage
- Debris in corneal flap interface
- Decentered corneal stromal ablation
- Dermoid cyst of cornea
- Dermoid cyst of eye proper
- Disruption of corneal endothelial pattern
- Drug-induced disorder of cornea
- Dry cornea
- EDICT syndrome
- Enlargement of corneal endothelial cells
- Entire corneal epithelial staining pattern
- Epithelial inclusion cyst of cornea
- Epithelial ingrowth
- Ferry's line
- Finding of tear meniscus
- Fluorescein staining of cornea
- High tear meniscus
- Hypertrophy of corneal epithelium
- Irregular astigmatism
- Irregular astigmatism - corneal
- Irregular corneal epithelial staining pattern
- Keratic precipitates
- Keratinization of ocular surface
- Limbal corneal ring
- Limbal guttering
- Limbal guttering - simple
- Limbal stem cell deficiency
- Lump at corneal limbus
- Marginal corneal infiltrate
- Metallic pigmentation of cornea
- Perforating corneoscleral wound
- Perforation of cornea
- Peripheral corneal epithelial staining pattern
- Persistent corneal epithelial defect
- Posterior polymorphic plaques in cornea
- Pseudo-gerontoxon
- Retrocorneal fibrous membrane
- Rheumatoid melting disorder of cornea
- Ring dermoid of cornea
- Stromal corneal hemorrhage
- Tear film finding
- Vogt's limbal girdle
- Vogt's limbal girdle, type I
- Vogt's limbal girdle, type II
- Vogt's striae
- Vortex keratopathy
- Xerosis of cornea
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Limbal Stem Cell Deficiency
loss or disturbance of limbal stem cell function in the corneal limbus resulting in inability to self-renew corneal epithelium and conjunctivalized corneal surface.Corneal Warpage
a change in the shape of the corneal surface presenting as abnormal radial symmetry.Corneal Thinning
progressive deformation of the corneal structure, characterized by thinning of the cornea.
Patient EducationClinical
Corneal Disorders
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.
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Convert H18.899 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About H18.899Overview
Is H18.899 (Other specified disorders of cornea) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified disorders of cornea, unspecified eye on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does H18.899 group to?
When other specified disorders of cornea, unspecified eye is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of H18.899?
Under the General Equivalence Mappings, other specified disorders of cornea, unspecified eye converts to ICD-9-CM 371.89 (corneal disorder NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
