Convert ICD-9-CM Diagnosis 991.0 to ICD-10-CM

ICD-9-CM 991.0 converts approximately to:
  • 2020 ICD-10-CM T33.09XA Superficial frostbite of other part of head, initial encounter
    or:
  • 2020 ICD-10-CM T34.09XA Frostbite with tissue necrosis of other part of head, initial encounter

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: 2020 ICD-10-CM CMS General Equivalence Mappings.