L98.A1Non-pressure chronic ulcer of upper arm

L98.A1 is the ICD-10-CM diagnosis code for Non-pressure chronic ulcer of upper arm. It belongs to category L98 (other disorders of skin and subcutaneous tissue, not elsewhere classified), block L80-L99 (other disorders of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within L98.A (Non-pressure chronic ulcer of upper limb, not elsewhere classified), L98.A1 is specifically for Non-pressure chronic ulcer of upper arm. Related codes cover forearm (L98.A2) and hand (L98.A3).

To report this condition, pick the subcode that matches the documentation: L98.A11 (arm), L98.A12 (arm) and L98.A19 (arm).

It was added in FY2026, effective October 1, 2025.