Hi. Would it be safe to say that the primary codes in this set could be considered "cosmetic", and the secondary codes "medically necessary" because the field of vision is likely being affected?
What do you mean by 'primary' and 'secondary' codes? Either way, whether a service is cosmetic or medically necessary is something that is determined based on physician assessment of patient needs and/or by payer policies - CPT codes are never cosmetic or not in and of themselves. In this case, whether or not the field of vision is affected is usually one of the main criteria that payers use to determine whether or not to allow coverage for the procedure, but the code will be selected on what actual procedure is performed.