C69.00

HCC Category Mapping

What This Code Means

This code represents cancer that has started in the conjunctiva, which is the clear membrane covering the white part of the eye and inner eyelids. The specific location on the conjunctiva has not been specified in the medical record.

Coding Tips

• •If the provider documents a specific site of the conjunctival malignancy (such as bulbar, palpebral, or fornix), use the more specific C69.01-C69.09 codes instead of the unspecified code C69.00
• •This code requires a laterality indicator (right eye, left eye, or bilateral) to be complete; verify documentation specifies which eye(s) are affected and append the appropriate 7th character

Clinical Significance

Conjunctival malignancy, while rare, is significant for risk adjustment because it represents an active ocular surface cancer that can range from squamous cell carcinoma to melanoma or lymphoma. These tumors require specialized ophthalmic oncology management and carry risk of local invasion into the orbit and, in the case of melanoma, systemic metastasis.

Documentation Requirements

• ✓Pathology confirming malignancy with histological type (squamous cell carcinoma, melanoma, lymphoma)
• ✓Laterality (right, left, or bilateral) — this unspecified code should only be used when laterality is truly unknown
• ✓Specific conjunctival location if known (bulbar, palpebral, fornix)
• ✓Clinical staging including tumor size and depth of invasion
• ✓Ophthalmologic examination findings

Commonly Confused Codes