1. Federal Register, May 4, 2005. New ICD-9-CM codes for CKD, showing revisions Revise585Chronic renal failure Chronic kidney disease (CKD) AddUse additional code to identify kidney-transplant status, if applicable New code585.1Chronic kidney disease, stage 1 New code585.2Chronic kidney disease, stage 2 (mild) New code585.3Chronic kidney disease, stage 3 (moderate) New code585.4Chronic kidney disease, stage 4 (severe)

2. Federal Register, May 4, 2005. New ICD-9-CM codes for CKD, showing revisions New code585.5Chronic kidney disease, stage 5 New code585.6End-stage renal disease New code585.9 Chronic kidney disease, unspecified Chronic renal disease Chronic renal failure NOS Chronic renal insufficiency

3. Federal Register, May 4, 2005. New ICD-9-CM codes for CKD, showing revisions 285.2Anemia in chronic illness Revise285.21Anemia in end-stage renal disease chronic kidney disease AddAnemia in end-stage renal disease Revise403Hypertensive renal kidney disease AddUse additional code to identify the stage of chronic kidney disease (585.1-585.6), if known