| 00 | Treatment data not coded/transmitted (i.e., all treatment fields [items 1200-1450 and 1500-1645] blank) |
| 01 | Treatment data coded using 1-digit surgery codes (obsolete) |
| 02 | Treatment data coded according to 1983-1992 SEER manuals and 1983-1995 CoC manuals |
| 03 | Treatment data coded according to 1996 ROADS Manual |
| 04 | Treatment data coded according to 1998 ROADS Supplement |
| 05 | Treatment data coded according to 1998 SEER Manual |
| 06 | Treatment data coded according to FORDS manual |
| 07 | Treatment data coded according to 2010 SEER Coding Manual |
| 08 | Treatment data coded according to STORE Manual and 2018 SEER Coding Manual |
| 99 | Other coding, including partial or nonstandard coding |
| |