If a patient comes in with bilateral ureteral and kidney stones and has hydronephrosis as a complication from the stones and the provider performs lithotripsy for treatment of the stones and places stents, would you code just the stones N20.2? The provider specifically stated that there was no obstruction so N13.2 is not an option. He is placing the stents so the stone fragments can exit, not to treat the hydronephrosis. So I am thinking the primary dx is the N20.2 and we wouldn’t code the hydro since it is not being treated. The assumption is once the fragmented stones pass the hydro will resolve on its own. Thoughts on this please!