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| Display String | AJCC7 Storage Code | Comments |
|---|---|---|
| NX | 999 | NX |
| N0 | 000 | N0 |
| N0(i-) | 010 | N0(i-) |
| N0(i+) | 020 | N0(i+) |
| N0(mol-) | 030 | N0(mol-) |
| N0(mol+) | 040 | N0(mol+) |
| N1 | 100 | N1 |
| N1NOS | 199 | N1 NOS |
| N1a | 110 | N1a |
| N1b | 120 | N1b |
| N1c | 130 | N1c |
| N1mi | 180 | N1mi |
| N2 | 200 | N2 |
| N2NOS | 299 | N2 NOS |
| N2a | 210 | N2a |
| N2b | 220 | N2b |
| N2c | 230 | N2c |
| N3 | 300 | N3 |
| N3NOS | 399 | N3 NOS |
| N3a | 310 | N3a |
| N3b | 320 | N3b |
| N3c | 330 | N3c |
| N4 | 400 | N4 |
| NA | 888 | Not applicable |
| <Any value> | Error |
