ICD-10 Code H10.519 – Ligneous Conjunctivitis, Unspecified Eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.519 – Ligneous conjunctivitis, unspecified eye
What it is
This code identifies ligneous conjunctivitis affecting an unspecified eye. It refers to a rare, chronic conjunctival inflammation with woody-appearing membranes; use the code when the record does not specify right or left eye.
Clinical signs
Typical findings include recurrent, firm fibrinous pseudomembranes on the conjunctiva and chronic redness or irritation. Clinical features vary; refer to documentation for laterality and any associated corneal involvement.
When to use this code
Use H10.519 when the provider documents ligneous conjunctivitis but does not identify which eye is affected. It is also appropriate when laterality is unclear in the note. Code the documented eye-specific form if the record later specifies right or left.
Do not use for
Do not use this code for other conjunctivitis types, such as allergic, viral, or unspecified conjunctivitis without the ligneous diagnosis. Do not guess laterality; check documentation.
Coding tip
Confirm both the diagnosis and laterality in the chart before assigning H10.519.