Non-Billable / Non-Specific Code
ICD-10-CM H18 is the diagnosis code for Other disorders of cornea. This code falls under the section "Disorders of sclera, cornea, iris and ciliary body" within Chapter 7 — Diseases of the eye and adnexa (H00-H59). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where H18 sits in the ICD-10-CM classification helps ensure proper coding:
No, H18 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
H18 is the ICD-10-CM diagnosis code for "Other disorders of cornea". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
H18 is located in Section H15-H22 — "Disorders of sclera, cornea, iris and ciliary body" within Chapter 7 of the ICD-10-CM Tabular List.
H18 has 10 sub-code(s) that provide more specific detail: H18.0, H18.1, H18.2, H18.3, H18.4 and more.
Use H18 when the patients documented diagnosis matches "Other disorders of cornea" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Other disorders of cornea is H18.
No, H18 is non-billable. Use a more specific sub-code for primary diagnosis billing.
H18 is in Chapter 7 of the ICD-10-CM Tabular List.
Yes, H18 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.