ICD-10 Code L97.309 – Non-pressure chronic ulcer of unspecified ankle with unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.309 – Non-pressure chronic ulcer of unspecified ankle with unspecified severity
What it is
This code identifies a chronic, non-pressure ulcer located on the ankle when the side and severity are not specified. Use it for a persistent skin break that is not caused by pressure.
Clinical signs
Typical findings include an open sore at the ankle with delayed healing, drainage, or surrounding skin changes. Clinical features vary; refer to documentation.
When to use this code
Use L97.309 when the record documents a chronic ankle ulcer but does not state whether it is right or left, or when severity is not further described. It is appropriate for non-pressure ulcers only. Check documentation if the cause or site is unclear.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers at another foot or leg site. If the record specifies laterality or severity, code to the more specific option.
Coding tip
Verify that the ulcer is documented as chronic and non-pressure before assigning L97.309.