ICD-10 Code H16.253 – Phlyctenular keratoconjunctivitis, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.253 – Phlyctenular keratoconjunctivitis, bilateral
What it is
H16.253 identifies phlyctenular keratoconjunctivitis affecting both eyes. It describes an inflammatory eye condition involving the conjunctiva and cornea, documented as bilateral.
Clinical signs
Typical findings include small nodular or raised lesions on the conjunctiva or cornea, with redness, tearing, irritation, and light sensitivity. Clinical features vary; refer to documentation.
When to use this code
Use H16.253 when the provider documents phlyctenular keratoconjunctivitis in both eyes or bilateral involvement is clearly stated. This code fits confirmed diagnoses, not just suspected eye inflammation. If the record does not specify laterality, check documentation.
Do not use for
Do not use this code for unilateral disease or for nonspecific conjunctivitis or keratitis without phlyctenular documentation. Check documentation when the eye condition is described only generally.
Coding tip
Verify that the chart explicitly states bilateral involvement before assigning H16.253.