Primary optic atrophy, bilateral

This code signifies the degeneration of the optic nerve due to a primary, non-secondary cause, affecting both eyes. This atrophy leads to impaired visual function, often characterized by reduced visual acuity, visual field defects, and changes in the optic disc appearance.

Apply this code when documentation explicitly states "primary optic atrophy" affecting both eyes. This diagnosis is typically made after ruling out secondary causes such as glaucoma, inflammation, or compression. Supporting documentation includes ophthalmological exam findings, visual field tests, and imaging results confirming bilateral optic nerve damage.

• Ensure the documentation specifies "primary" optic atrophy; otherwise, consider codes for secondary optic atrophy.
• Verify that both eyes are affected; if only one eye is involved, use the appropriate unilateral code.
• Distinguish from optic neuropathy, which may be a broader term and not necessarily imply atrophy.