Electroretinography (ERG)

Electroretinography (ERG) is covered when used to detect loss of retinal function, to distinguish retinal versus optic nerve lesions, and to detect chloroquine or hydroxychloroquine retinal toxicity. ERG is investigational and not covered for any other indications, explicitly including glaucoma. No specific documentation or frequency limits are specified in this policy.

"Electroretinography (ERG) is covered to detect loss of retinal function."

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