Myopathy of extraocular muscles, left orbit

This code signifies a disease affecting the muscles responsible for eye movement, specifically in the left eye. It indicates a primary muscle disorder rather than a neurological issue, leading to impaired function of the extraocular muscles.

Apply this code when documentation clearly indicates a myopathic condition affecting the extraocular muscles of the left orbit. This would include diagnoses such as ocular myasthenia gravis, mitochondrial myopathy, or other primary muscle diseases presenting with left-sided ophthalmoplegia or strabismus.

• Ensure documentation specifies "myopathy" and not a neurological cause for extraocular muscle dysfunction.
• Verify laterality; this code is specific to the left orbit.
• Consider sequencing this code with a more specific underlying systemic disease if known (e.g., G70.00 for Myasthenia Gravis without acute exacerbation).