L97.922

HCC Category Mapping

What This Code Means

A chronic open sore on the left lower leg that is not caused by pressure, with the fatty tissue layer exposed beneath the skin.

Coding Tips

• •Document that fat layer exposure is present; this indicates moderate severity
• •Ensure distinction from deeper tissue involvement (muscle or bone necrosis)

Clinical Significance

This non-pressure chronic ulcer on the unspecified part of left lower leg with exposed subcutaneous fat indicates moderate tissue destruction that has penetrated beyond the dermis, signaling worsening wound status and increased infection risk. Chronic non-pressure ulcers are significant for risk adjustment because they indicate ongoing complex wound management needs, increased healthcare utilization, and often reflect underlying systemic conditions such as peripheral vascular disease, diabetes mellitus, or venous insufficiency. Accurate severity coding directly impacts care planning, specialist referral decisions, and appropriate resource allocation for wound care services.

Documentation Requirements

• ✓Confirmation that the ulcer is chronic (present for extended duration, not acute)
• ✓Documentation that the ulcer is NOT caused by pressure (non-pressure etiology)
• ✓Specific anatomical site of the ulcer on the unspecified part of left lower leg
• ✓Laterality documented as left side
• ✓Wound assessment documenting exposed subcutaneous fat layer
• ✓Confirmation that deeper structures (muscle, bone) are not involved
• ✓Underlying etiology or contributing conditions (e.g., venous insufficiency, arterial disease, diabetes mellitus, neuropathy)
• ✓Current wound measurements (length, width, depth) and wound bed description
• ✓Current treatment plan and wound care management

Commonly Confused Codes