T33.839A Superficial frostbite of unspecified toe(s), initial encounter

Billable ICD-10-CM code, FY2026.

Built from T33.839 with 7th character A (initial encounter).

Applies from T33 Superficial frostbite

Includes

• frostbite with partial thickness skin loss

7th character note

• The appropriate 7th character is to be added to each code from category T33

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to T33.839A

Back-references to T33.8

• Type 2 Excludes: T33.7 Superficial frostbite of knee and lower leg ("superficial frostbite of ankle and foot (T33.8-)")

Back-references to T33

• Type 2 Excludes: I73 Other peripheral vascular diseases ("frostbite (T33-T34)")
• Type 2 Excludes: T68 Hypothermia ("frostbite (T33-T34)")
• Type 2 Excludes: T69 Other effects of reduced temperature ("frostbite (T33-T34)")

Nearby codes

• T33.832 Superficial frostbite of left toe(s)
• T33.832A Superficial frostbite of left toe(s), initial encounter
• T33.832D Superficial frostbite of left toe(s), subsequent encounter
• T33.832S Superficial frostbite of left toe(s), sequela
• T33.839 Superficial frostbite of unspecified toe(s)
• T33.839A Superficial frostbite of unspecified toe(s), initial encounter (this code)
• T33.839D Superficial frostbite of unspecified toe(s), subsequent encounter
• T33.839S Superficial frostbite of unspecified toe(s), sequela
• T33.9 Superficial frostbite of other and unspecified sites
• T33.90 Superficial frostbite of unspecified sites
• T33.90XA Superficial frostbite of unspecified sites, initial encounter