ICD-10-CM H16 is the diagnosis code for Keratitis. 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 H16 sits in the ICD-10-CM classification helps ensure proper coding:
No, H16 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
H16 is the ICD-10-CM diagnosis code for "Keratitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
H16 is located in Section H15-H22 — "Disorders of sclera, cornea, iris and ciliary body" within Chapter 7 of the ICD-10-CM Tabular List.
H16 has 7 sub-code(s) that provide more specific detail: H16.0, H16.1, H16.2, H16.3, H16.4 and more.
Use H16 when the patients documented diagnosis matches "Keratitis" 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 Keratitis is H16.
No, H16 is non-billable. Use a more specific sub-code for primary diagnosis billing.
H16 is in Chapter 7 of the ICD-10-CM Tabular List.
Yes, H16 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.