ICD-10 Code H10.212 – Acute toxic conjunctivitis, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.212 – Acute toxic conjunctivitis, left eye
What it is
This code identifies an acute inflammation of the left conjunctiva caused by exposure to an irritating or toxic substance. It applies when the condition is limited to the left eye and documented as toxic conjunctivitis.
Clinical signs
Typical findings include redness, irritation, tearing, burning, and conjunctival swelling after contact with an irritant. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states acute toxic conjunctivitis affecting the left eye. It is appropriate for chemical or irritant exposure documented as the cause, when the provider specifies the left eye. If laterality is unclear, check documentation.
Do not use for
Do not use this code for allergic, viral, or bacterial conjunctivitis, or for nonspecific eye irritation without toxic exposure. Do not assume laterality if the chart does not specify the left eye.
Coding tip
Verify both the toxic cause and left-eye laterality in the provider note before assigning H10.212.