Deep necrosis of underlying tissues [deep third degree] without mention of loss of a body part, of nose (septum)
Convert to ICD-10-CM: 
941.45 converts approximately to:
- 2015/16 ICD-10-CM T20.34XA Burn of third degree of nose (septum), initial encounterOr: 
- 2015/16 ICD-10-CM T20.74XA Corrosion of third degree of nose (septum), initial encounter