Glaucoma in diseases classified elsewhere

This code represents glaucoma that arises as a manifestation or complication of another underlying systemic disease, rather than as a primary ocular condition. It indicates a secondary form of glaucoma where the primary etiology is a disease classified in another chapter of ICD-10-CM.

Use this code when documentation clearly links glaucoma to a specific systemic disease, such as diabetes mellitus, sarcoidosis, or certain autoimmune disorders, and the underlying disease is coded separately. This code is appropriate when the glaucoma is a direct consequence of the systemic condition, and the primary disease is identified as the cause.

• Always sequence the underlying systemic disease first, followed by this code to indicate the manifestation.
• Carefully review the "Excludes1" notes to avoid incorrect co-coding with specific infectious causes of glaucoma.
• Ensure the physician's documentation explicitly states the causal relationship between the systemic disease and the glaucoma.