ICD-10 Code C69.42 – Malignant neoplasm of left ciliary body (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C69.42 – Malignant neoplasm of left ciliary body
What it is
C69.42 identifies a malignant tumor arising in the ciliary body of the left eye. Use it when the provider documents cancer in that specific ocular structure.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include an intraocular mass, blurred vision, pain, or secondary glaucoma, but you should code only what is confirmed.
When to use this code
Use C69.42 when the record clearly states a malignant neoplasm of the left ciliary body. It is appropriate for confirmed primary ocular cancer in that site, including pathology or specialist documentation. If laterality or exact site is unclear, check documentation before assigning the code.
Do not use for
Do not use this code for benign ciliary body tumors, metastatic disease to the eye, or unspecified ocular malignancy. If the lesion is in a different eye structure, choose the documented site instead.
Coding tip
Verify both laterality and anatomic site in the ophthalmology note before coding.