Deep necrosis of underlying tissues due to burn (deep third degree unspecified site with loss of a body part
Convert to ICD-10-CM: 
949.5 converts approximately to:
- 2015/16 ICD-10-CM T30.0 Burn of unspecified body region, unspecified degreeOr: 
- 2015/16 ICD-10-CM T30.4 Corrosion of unspecified body region, unspecified degree