ICD-10 Code L97.403 – Non-pressure chronic ulcer of unspecified heel and midfoot with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.403 – Non-pressure chronic ulcer of unspecified heel and midfoot with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on an unspecified heel or midfoot area with muscle necrosis. Use it when the record documents tissue loss extending to muscle, without a pressure injury cause.
Clinical signs
Typical documentation includes an open ulcer on the heel or midfoot with necrotic muscle involvement. Clinical features vary; refer to documentation for laterality, depth, and whether bone or tendon is also affected.
When to use this code
Use L97.403 when the provider clearly documents a chronic non-pressure ulcer of the heel or midfoot and specifies necrosis of muscle. It is appropriate when the site is not further identified as right or left. Check documentation if the ulcer is described as pressure-related or if another depth category is stated.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers at other foot locations. Also avoid it when the record specifies laterality or a different tissue depth; check documentation.
Coding tip
Confirm the ulcer is chronic, non-pressure, and documented as involving muscle before assigning L97.403.