If 2 different physicians from 2 different sub-specialties of Ophthalmology see the same patient on the same day with 2 different diagnosis codes can both visits be billed to insurance? For example, a Retina dr. sees pt. for diabetic retinopathy/AMD and also sees a Cornea dr. for cataract eval. to discuss extraction can both bill a visit? Does one need to bill an E/M and one bill an eye code? Thanks for any info!!!