ICD-10 Code H26.40 – Unspecified secondary cataract (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H26.40 – Unspecified secondary cataract
What it is
H26.40 identifies a secondary cataract when the specific type is not documented. Use it for clouding that develops after prior eye surgery or other lens-related change, when the record does not name a more precise form.
Clinical signs
Typical findings include blurred or dim vision, glare, and reduced visual clarity after cataract surgery. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents secondary cataract but does not specify the exact subtype or cause. It may fit postoperative cases where posterior capsule opacification is not further detailed in the note. If the record names a more specific secondary cataract, code that instead.
Do not use for
Do not use H26.40 for primary age-related cataract or for a clearly documented, more specific secondary cataract code. Check documentation if the eye condition is described only as postoperative visual loss without cataract wording.
Coding tip
Query the provider when the note says “secondary cataract” but laterality or specificity is missing.