Extension Behavior Table
Notes
**Note**: For CS Extension codes 050 and 070 ONLY, Summary Stage 1977 and Summary Stage 2000 are assigned based on the value of Behavior Code ICD-0-3, as shown in this table.| Behavior Code ICD-O-3 | SS77 | SS2000 | Comment |
|---|---|---|---|
| 0 | ERROR: | ERROR: | Behavior code of 0 should not be used with CS Extension code 050 or 070. |
| 1 | ERROR: | ERROR: | Behavior code of 1 should not be used with CS Extension code 050 or 070. |
| 2 | IS | IS | |
| 3 | L | L |