ICD-10 Code H16.25 – Phlyctenular keratoconjunctivitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H16.25 – Phlyctenular keratoconjunctivitis
What it is
H16.25 identifies phlyctenular keratoconjunctivitis, an inflammatory eye condition affecting the conjunctiva and cornea. Use it when the record specifically documents this diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include localized ocular inflammation with small nodular lesions and associated redness, irritation, tearing, or light sensitivity.
When to use this code
Use H16.25 when the clinician diagnoses phlyctenular keratoconjunctivitis in the eye examination or assessment. It may appear in ophthalmology notes describing corneal or conjunctival inflammation with phlyctenules. If the note is nonspecific, check documentation before coding.
Do not use for
Do not use this code for general conjunctivitis, keratitis, or other eye inflammation unless phlyctenular keratoconjunctivitis is explicitly documented. If the diagnosis is uncertain, check documentation.
Coding tip
Code only when the provider names phlyctenular keratoconjunctivitis; otherwise, query for a more specific eye diagnosis.