Deep necrosis of underlying tissues [deep third degree] with loss of a body part, of neck
Convert to ICD-10-CM: 
941.58 converts approximately to:
- 2015/16 ICD-10-CM T20.37XA Burn of third degree of neck, initial encounterOr: 
- 2015/16 ICD-10-CM T20.77XA Corrosion of third degree of neck, initial encounter