L97.113
BillableNon-pressure chronic ulcer of right thigh with necrosis of muscle
HCC Category Mapping
V28HCC 380 — Chronic Ulcer of Skin, Except Pressure
0.426V24HCC 161 — Chronic Ulcer of Skin, Except Pressure
0.426ESRDHCC 161 — Chronic Ulcer of Skin, Except Pressure
0.000RxHCCHCC 311 — Diabetic and Chronic Skin Ulcer
0.000What This Code Means
A long-lasting open sore on the right thigh that is not caused by pressure, with dead muscle tissue visible in the wound.
Coding Tips
- •Document evidence of muscle necrosis (tissue death) in the clinical notes; this indicates a more severe ulcer
- •Ensure distinction from L97.115 which has muscle involvement without necrosis
Clinical Significance
A non-pressure chronic ulcer of the right thigh with necrosis of muscle represents a deep, non-healing wound involving structures beyond the subcutaneous tissue. These ulcers typically result from peripheral vascular disease, venous insufficiency, or other systemic conditions, and indicate significant tissue destruction requiring complex wound management. Deep non-pressure chronic ulcers map to V28 HCC 380 (Chronic Ulcer of Skin, Except Pressure) with a RAF of 0.426, reflecting the substantial clinical resources needed for management.
Documentation Requirements
- ✓Exact anatomical location with laterality (right, left, or bilateral thigh)
- ✓Etiology of the ulcer (venous insufficiency, peripheral arterial disease, neuropathic, post-traumatic, other)
- ✓Wound dimensions: length x width x depth in centimeters
- ✓Documentation of involved structures (muscle, bone, tendon) with or without necrosis
- ✓Wound bed description including percentage of granulation, slough, eschar, and necrotic tissue
- ✓Presence of undermining, tunneling, or sinus tracts with measurements
- ✓Vascular assessment results (ankle-brachial index, duplex ultrasound)
- ✓Current wound care plan including debridement method, dressing type, and frequency
- ✓Signs of infection (cellulitis, osteomyelitis, positive wound cultures)
- ✓Chronicity documentation — duration of wound and treatment history
- ✓Contributing comorbidities (diabetes mellitus, peripheral vascular disease, malnutrition)
Commonly Confused Codes
L97.123 — Non-pressure chronic ulcer of left thigh, same severity; verify correct lateralityL97.103 — Non-pressure chronic ulcer of unspecified thigh; use right-specific code when laterality is documentedL97.115 — Same site with different severity; ensure the correct depth/involvement is codedL89.xxx — Pressure ulcers have different etiology (sustained pressure) and map to different HCC categories
Code Hierarchy
└L97Non-pressure chronic ulcer of lower limb, not elsewhere classified└L97.1Non-pressure chronic ulcer of thigh└L97.11Non-pressure chronic ulcer of right thigh└L97.113Non-pressure chronic ulcer of right thigh with necrosis of muscle
└L97.113Non-pressure chronic ulcer of right thigh with necrosis of muscle