ICD-10 Code L97.421 – Non-pressure chronic ulcer of left heel and midfoot limited to breakdown of skin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.421 – Non-pressure chronic ulcer of left heel and midfoot limited to breakdown of skin
What it is
This code identifies a chronic, non-pressure ulcer on the left heel or midfoot with skin breakdown limited to the epidermis and/or superficial dermis. It excludes deeper tissue loss and pressure-related ulcers.
Clinical signs
Look for an open sore on the left heel or midfoot with superficial skin loss, often with a shallow base and no exposed fat, muscle, or bone. Clinical features vary; refer to documentation.
When to use this code
Use L97.421 when the record clearly states a chronic non-pressure ulcer on the left heel or midfoot and specifies breakdown of skin only. Apply it when the site and depth are both documented. Check documentation if the ulcer is described as deeper, infected, or pressure-related.
Do not use for
Do not use this code for pressure ulcers, ulcers on other left foot locations, or ulcers extending beyond skin breakdown. If laterality, site, or depth is unclear, check documentation.
Coding tip
Confirm both laterality and ulcer depth before assigning L97.421.