ICD-10 Code L97.303 – Non-pressure chronic ulcer of unspecified ankle with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.303 – Non-pressure chronic ulcer of unspecified ankle with necrosis of muscle
What it is
This code identifies a chronic ulcer on an unspecified ankle that is not caused by pressure and extends to the muscle, with muscle necrosis documented. Use it when the record clearly states ankle location and muscle involvement.
Clinical signs
Typical findings include a persistent open ulcer at the ankle with tissue loss deep enough to involve muscle. Clinical features vary; refer to documentation for evidence of necrosis and the non-pressure cause.
When to use this code
Use L97.303 when the provider documents a chronic ankle ulcer, does not specify left or right, and notes necrosis of muscle. It fits wound assessments that describe depth to muscle without pressure injury as the cause. Check documentation if laterality or etiology is unclear.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers without muscle necrosis. If the ankle side is documented, use the laterality-specific code instead.
Coding tip
Verify chronicity, non-pressure etiology, ankle site, and muscle involvement before assigning L97.303.