ICD-10 Code H20.821 – Vogt-Koyanagi syndrome, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H20.821 – Vogt-Koyanagi syndrome, right eye
What it is
This code identifies Vogt-Koyanagi syndrome affecting the right eye. It is used when the documentation specifies the condition is limited to, or noted in, the right eye.
Clinical signs
Clinical features vary; refer to documentation. Vogt-Koyanagi syndrome may involve ocular inflammation consistent with uveitis, but you should code only what is documented for the right eye.
When to use this code
Use H20.821 when the provider documents Vogt-Koyanagi syndrome in the right eye. Apply it for encounters focused on diagnosis, follow-up, or active management of the documented eye involvement.
If the record states bilateral disease or does not identify laterality, check documentation before assigning this code. Laterality must be explicit for accurate coding.
Do not use for
Do not use this code for unspecified eye involvement or for left-eye disease. If the note only says Vogt-Koyanagi syndrome without laterality, check documentation.
Coding tip
Confirm laterality in the assessment or problem list before coding, because H20.821 is specific to the right eye.