Convert ICD-10-CM T23.311A to ICD-9-CM

ICD-10-CM T23.311A converts approximately to:
  • 2015 ICD-9-CM 944.32 Full-thickness skin loss [third degree, not otherwise specified] of thumb (nail)
    or:
  • 2015 ICD-9-CM 944.42 Deep necrosis of underlying tissues [deep third degree] without mention of loss of a body part, thumb (nail)
    or:
  • 2015 ICD-9-CM 944.52 Deep necrosis of underlying tissues [deep third degree] with loss of a body part, of thumb (nail)

Note: approximate conversions between ICD-9-CM codes and ICD-10-CM codes may require clinical interpretation in order to determine the most appropriate conversion code(s) for your specific coding situation.

Source: 2021 ICD-10-CM CMS General Equivalence Mappings.