Ophthalmologists do routine follow-ups for diabetes each year looking for retinopathy. Eye codes can be used for these follow-ups. Make sure your exam elements are met. We use full SLT for intermediate codes 92002/92012 and Confrontational Visual Fields,Ocular Motility, full SLT and dilated Fundus exam for comprehensive codes 92004/92014. Also make sure you meet the criteria for initiating diagnostics/treatment for the comprehensive codes. There is some controversy as to whether to use the intermediate codes for yearly follow-ups: If a doc does a full exam yearly and lists: IDDM -no significant retinopathy and does not do any diagnostics/treatment (eyedrops for dry eyes/antibiotics/laser/OCT, Fundus photos,FA, etc) I code it with a 92002 for new pts and a 92012 for established pts. Riva Lee Asbell agrees with this. If the exam elements are not met, then you have to go with E/M codes, which follow set rules. Remember, the chief complaint written properly: "diabetic check for retinopathy/follow-up check on previous retinopathy treatment", etc) gives you the medical necessity.