Blindness left eye category 4, normal vision right eye

This code signifies profound vision impairment in the left eye, classified as Category 4 blindness, while the right eye maintains normal visual acuity. Category 4 blindness typically corresponds to a visual acuity of less than 20/400 to no light perception, or a visual field of 10 degrees or less from fixation.

Apply this code when a patient presents with documented blindness in the left eye, specifically meeting the criteria for Category 4 impairment, and the right eye's vision is assessed as normal. This is appropriate for conditions such as advanced glaucoma, retinal detachment, or optic neuropathy affecting only the left eye, with the right eye unaffected. Documentation should clearly state the visual acuity for both eyes and the laterality of the impairment.

• Ensure the medical record explicitly states "blindness" or a visual acuity measurement consistent with Category 4 for the left eye, and "normal vision" for the right eye.
• Do not use this code if the right eye also has any degree of visual impairment; a different H54 code would be more appropriate.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter or a significant co-morbidity impacting care.