Primary open-angle glaucoma, left eye, mild stage

This code signifies the presence of primary open-angle glaucoma affecting the left eye, specifically in its mild stage. This condition is characterized by elevated intraocular pressure leading to optic nerve damage and visual field loss, with an open anterior chamber angle. The "mild stage" indicates minimal optic nerve damage and visual field defects.

Apply this code when documentation confirms a diagnosis of primary open-angle glaucoma in the patient's left eye, and the ophthalmologist has explicitly staged the condition as mild. This typically involves findings such as early optic disc cupping, subtle visual field defects, and well-controlled intraocular pressure.

• Ensure the laterality (left eye) is clearly documented.
• Verify the specific stage of glaucoma (mild, moderate, severe, indeterminate) is explicitly stated by the physician.
• Do not use this code for secondary glaucoma or other types of glaucoma; those have distinct codes.