ICD-10 Code H10.30 – Unspecified acute conjunctivitis, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.30 – Unspecified acute conjunctivitis, unspecified eye
What it is
H10.30 identifies acute conjunctivitis in an unspecified eye when the provider does not document whether the right, left, or both eyes are involved. Use it for a new, short-term conjunctival inflammation without a more specific subtype.
Clinical signs
Typical findings include red eye, irritation, tearing, and discharge, but the exact appearance may vary. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states acute conjunctivitis but does not specify the eye involved. It also fits when the documentation is limited to “unspecified eye” or similar wording and no more specific conjunctivitis type is recorded. If laterality is documented, code more specifically.
Do not use for
Do not use it for chronic conjunctivitis or for conjunctivitis with a documented cause or subtype that has its own code. Check documentation.
Coding tip
Query the provider if the eye laterality is missing, because unspecified laterality should be coded only when no better detail is available.