ICD-9-CM diagnosis code (retired)
991.3 — Frostbite of other and unspecified sites
About ICD-9-CM 991.3
991.3 is an ICD-9-CM diagnosis code for frostbite of other and unspecified sites. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to 4 ICD-10-CM codes, such as T33.90XA (Superficial frostbite of unspecified sites, initial encounter), T33.99XA (Superficial frostbite of other sites, initial encounter) and T34.90XA (Frostbite with tissue necrosis of unspecified sites, initial encounter). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- T33.90XASuperficial frostbite of unspecified sites, initial encounterapproximate
- T33.99XASuperficial frostbite of other sites, initial encounterapproximate
- T34.90XAFrostbite with tissue necrosis of unspecified sites, initial encounterapproximate
- T34.99XAFrostbite with tissue necrosis of other sites, initial encounterapproximate
Common questions about 991.3
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.