Retroperitoneal fibrosis icd 10 code July 8, 2019 16 32 64 128 Icd 10 code for retroperitoneal fibrosis with hydronephrosis Icd 10 code for idiopathic retroperitoneal fibrosis Retroperitoneal fibrosis icd 10 Retroperitoneal mass icd 9 Idiopathic retroperitoneal fibrosis icd 10