Table 2.
The ICD-10 codes for CKD
| Aetiology or stage of CKD | ICD coding |
| Diabetes mellitus | |
| Type 1 diabetes mellitus with renal complications | E10.2 |
| Type 2 diabetes mellitus with renal complications | E11.2 |
| Other specified diabetes mellitus with renal complications | E13.2 |
| Unspecified diabetes mellitus with renal complications | E14.2 |
| Hypertensive diseases | |
| Hypertensive renal disease with renal failure | I12.0 |
| Hypertensive renal disease without renal failure | I12.9 |
| Hypertensive heart and renal disease with (congestive) heart failure | I13.0 |
| Hypertensive heart and renal disease with renal failure | I13.1 |
| Hypertensive heart and renal disease with both (congestive) heart failure and renal failure | I13.2 |
| Hypertensive heart and renal disease, unspecified | I13.9 |
| Glomerular diseases | |
| Acute nephritic syndrome, other | N00.8 |
| Recurrent and persistent haematuria | N02 |
| Chronic nephritic syndrome | N03 |
| Nephrotic syndrome | N04 |
| Unspecified nephritic syndrome | N05 |
| Isolated proteinuria with specified morphological lesion | N06 |
| Persistent proteinuria, unspecified | N39.1 |
| Renal tubulointerstitial diseases | |
| Chronic tubulointerstitial nephritis | N11 |
| Tubulointerstitial nephritis, not specified as acute or chronic | N12 |
| Drug-induced and heavy metal-induced tubulointerstitial and tubular conditions | N14 |
| Other renal tubulointerstitial diseases | N15 |
| Renal tubulointerstitial disorders in diseases classified elsewhere | N16 (exclude N16.4) |
| Other specified disorders of carbohydrate metabolism | E74.8 |
| Disorders of amino acid transport | E72.0 |
| Nephrogenic diabetes insipidus | N25.1 |
| Obstructive nephropathy | |
| Hydronephrosis with ureteropelvic junction obstruction | N13.0 |
| Hydronephrosis with ureteral stricture, not elsewhere classified | N13.1 |
| Hydronephrosis with renal and ureteral calculous obstruction | N13.2 |
| Other chronic kidney failure, unknown cause | |
| CKD | N18 not combined with I10 |
| Unspecified kidney failure | N19 not combined with I10 |
| Stage of CKD | |
| CKD stage 1 | N18.801 |
| CKD stage 2 | N18.802 |
| CKD stage 3 | N18.803 |
| CKD stage 4 | N18.804 |
| CKD stage 5 | N18.001 |
CKD, chronic kidney disease; ICD-10, International Classification of Diseases, 10th Revision; ICD, International Classification of Diseases.