ICD-10 Code E13.621 – Other specified diabetes mellitus with foot ulcer (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E13.621 – Other specified diabetes mellitus with foot ulcer
What it is
This code identifies a foot ulcer occurring in a patient with other specified diabetes mellitus. It is used when the diabetes type does not fit the standard categories but is still documented as causing the ulcer.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include an open sore on the foot, surrounding skin breakdown, and evidence that diabetes is part of the clinical picture.
When to use this code
Use E13.621 when the provider documents a foot ulcer and specifies other diabetes mellitus as the underlying condition. The record should link the ulcer to diabetes, not to trauma alone or another primary cause. Add any additional codes needed for ulcer depth, site, or severity if documented.
Do not use for
Do not use this code for foot ulcers without a documented diabetes association. Do not assign it when the diabetes type is better classified under a different diabetes category.
Coding tip
Verify both the diabetes type and the ulcer documentation before coding, and check documentation for ulcer location and severity details.