ICD-10 Code H10.221 – Pseudomembranous conjunctivitis, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H10.221 – Pseudomembranous conjunctivitis, right eye
What it is
H10.221 identifies pseudomembranous conjunctivitis affecting the right eye. It means the conjunctiva has a removable membrane or film, usually from significant inflammation.
Clinical signs
Typical findings include conjunctival redness, irritation, tearing, and a pseudomembrane on the eye surface. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents pseudomembranous conjunctivitis in the right eye. It is appropriate when the record clearly specifies laterality and distinguishes the condition from other conjunctival infections or inflammation.
If the note only says conjunctivitis without laterality or membrane formation, check documentation before assigning H10.221. Code the documented diagnosis exactly as recorded.
Do not use for
Do not use this code for unspecified conjunctivitis, left eye, or bilateral disease. Do not use it when the record does not confirm a pseudomembrane.
Coding tip
Always verify both laterality and the presence of a pseudomembrane in the provider note before coding.