ICD-10 Code A51.43 – Secondary syphilitic oculopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A51.43 – Secondary syphilitic oculopathy
What it is
This code identifies eye involvement caused by secondary syphilis. Use it when the ocular condition is part of a confirmed secondary syphilis infection.
Clinical signs
Clinical features vary; refer to documentation. Eye findings may include inflammation or other ocular symptoms linked to syphilis, but the specific presentation should be documented by the clinician.
When to use this code
Use A51.43 when the record clearly states secondary syphilis with ocular involvement. Apply it for documented eye disease attributed to the secondary stage, not for nonspecific eye complaints alone.
If the note only says “syphilis” or “ocular symptoms” without linking them, check documentation before coding. Confirm the stage and the eye manifestation in the provider record.
Do not use for
Do not use this code for eye disease from other causes or for syphilis in a different stage. Check documentation if the record does not specify secondary syphilitic oculopathy.
Coding tip
Code the syphilis stage and ocular involvement exactly as documented; if either is unclear, query the provider.