Question: Kansas Subscriber Answer: Here's why: Modifier 59's description specifically states, "when another already established modifier is appropriate it should be used rather than modifier 59. Only if no more descriptive modifier is available and the use of modifier 59 best explains the circumstances should modifier 59 be used." Because your provider performed the injection procedures on mirror image or bilateral locations, you should report the injections as bilateral procedures rather than separate and distinct procedures, with one of these options: Option 1: Many payers, including most Medicare carriers, request bilateral procedures with modifier 50 (Bilateral procedure) and one unit of service. For those payers, report 20605 as one line item with modifier 50 and one unit of service. Option 2: Other payers want you to use modifiers LT (Left side) and RT (Right side) to report bilateral procedures instead. For these payers, report 20605-LT and 20605-RT as separate line items with one unit of service each. Remember: Regardless of your modifier choice, link 726.33 (Olecranon bursitis) to 20605 each time you report it to support medical necessity for the injections. Also, if your practice supplies the medication, include J1020 (Injection, methylprednisolone acetate, 20 mg) on the claim for the total amount of steroid injected.