ICD-10 Code C69.90 – Malignant neoplasm of unspecified site of unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.90 – Malignant neoplasm of unspecified site of unspecified eye
What it is
C69.90 identifies a malignant tumor in the eye when the exact site is not documented. Use it when the chart confirms eye cancer but does not specify the eye structure involved.
Clinical signs
Clinical features vary; refer to documentation. Eye malignancies may be noted through abnormal ocular findings, vision changes, or imaging and biopsy results confirming cancer.
When to use this code
Use this code when the provider documents a malignant neoplasm of the eye but leaves the site unspecified. It is appropriate for incomplete notes, pending clarification, or records that confirm malignancy without naming the exact eye location. Check documentation before assigning a more specific code.
Do not use for
Do not use this code if the record identifies a specific eye site, such as conjunctiva, retina, or choroid. Do not assign it for benign, uncertain, or metastatic lesions unless the documentation supports primary eye malignancy.
Coding tip
Query for the exact eye site whenever possible, because a more specific code is usually available.