ICD-10 Code H10.33 – Unspecified acute conjunctivitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.33 – Unspecified acute conjunctivitis, bilateral
What it is
H10.33 identifies acute conjunctivitis affecting both eyes when the cause is not specified. It covers a sudden-onset inflammation of the conjunctiva with bilateral involvement.
Clinical signs
Typical findings include red, irritated eyes, tearing, and discharge or crusting. Clinical features vary; refer to documentation when laterality, acuity, or cause is not clearly stated.
When to use this code
Use this code when the provider documents acute conjunctivitis in both eyes but does not identify a specific type such as allergic, viral, or bacterial. It also fits when the record clearly supports bilateral acute conjunctivitis and no more specific code is available.
Do not use for
Do not use H10.33 if the documentation identifies a specific conjunctivitis cause or a different laterality code. Do not assign it for chronic conjunctivitis or when the record says “unspecified” without acute bilateral disease.
Coding tip
Check the note for laterality and etiology first; if either is documented more specifically, code that instead of H10.33.