| N04 | Nephrotic syndrome | NON-BILLABLE CODE |
| N04.0 | Nephrotic syndrome with minor glomerular abnormality | BILLABLE CODE |
| N04.1 | Nephrotic syndrome with focal and segmental glomerular lesions | BILLABLE CODE |
| N04.2 | Nephrotic syndrome with diffuse membranous glomerulonephritis | NON-BILLABLE CODE |
| N04.20 | Nephrotic syndrome with diffuse membranous glomerulonephritis, unspecified | BILLABLE CODE |
| N04.21 | Primary membranous nephropathy with nephrotic syndrome | BILLABLE CODE |
| N04.22 | Secondary membranous nephropathy with nephrotic syndrome | BILLABLE CODE |
| N04.29 | Other nephrotic syndrome with diffuse membranous glomerulonephritis | BILLABLE CODE |
| N04.3 | Nephrotic syndrome with diffuse mesangial proliferative glomerulonephritis | BILLABLE CODE |
| N04.4 | Nephrotic syndrome with diffuse endocapillary proliferative glomerulonephritis | BILLABLE CODE |
| N04.5 | Nephrotic syndrome with diffuse mesangiocapillary glomerulonephritis | BILLABLE CODE |
| N04.6 | Nephrotic syndrome with dense deposit disease | BILLABLE CODE |
| N04.7 | Nephrotic syndrome with diffuse crescentic glomerulonephritis | BILLABLE CODE |
| N04.9 | Nephrotic syndrome with unspecified morphologic changes | BILLABLE CODE |
| N04.A | Nephrotic syndrome with C3 glomerulonephritis | BILLABLE CODE |
| N04.B | Nephrotic syndrome with immune complex membranoproliferative glomerulonephritis (IC-MPGN) | NON-BILLABLE CODE |
| N04.B1 | Nephrotic syndrome with idiopathic immune complex membranoproliferative glomerulonephritis (IC-MPGN) | BILLABLE CODE |
| N04.B2 | Nephrotic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN) | BILLABLE CODE |
