An indication of whether the excision margin was clear of the Tumour and if so, by how much.
National Codes:
| 01 | Excision margins are clear (distance from margin not stated) | 
| 02 | Excision margins are clear (Tumour greater than 5mm from the margin) | 
| 03 | Excision margins are clear (Tumour greater than 1mm but less than or equal to 5mm from the margin) | 
| 04 | Tumour is less than or equal to 1mm of excision margin, but does not reach margin | 
| 05 | Tumour reaches Tumour margin | 
| 06 | Uncertain (Unable to give a definitive answer) | 
| 07 | Margin not involved - equal to or greater than 1mm | 
| 08 | Margin not involved less than 1mm | 
| 09 | Margin not involved 1-5mm | 
This attribute is also known by these names:
| Context | Alias | 
|---|---|
| formerly | EXCISION MARGIN | 
| plural | EXCISION MARGIN INDICATION CODES |