Glaucoma with increased episcleral venous pressure, unsp eye

This code signifies a specific type of secondary glaucoma characterized by elevated pressure within the episcleral veins, leading to increased intraocular pressure. This condition impairs the eye's natural fluid drainage system due to the back pressure from the venous system. The "unspecified eye" designation indicates that the laterality of the affected eye is not documented.

Apply this code when the physician explicitly diagnoses glaucoma secondary to increased episcleral venous pressure, and the medical record does not specify whether the right or left eye is affected. Documentation should clearly link the elevated intraocular pressure to a confirmed increase in episcleral venous pressure.

• Ensure documentation explicitly states "increased episcleral venous pressure" as the cause of glaucoma.
• Avoid using this code if the laterality (right, left, or bilateral) is specified; use the more specific codes H40.811 or H40.812.
• Always sequence this code after the underlying cause of the increased episcleral venous pressure, if known and documented.