L89.120
BillablePressure ulcer of left upper back, unstageable
HCC Category Mapping
V28HCC 381 — Pressure Ulcer of Skin, Unstageable/Unspecified
0.000V24HCC 158 — Pressure Ulcer of Skin with Full Thickness Skin Loss
0.662ESRDHCC 158 — Pressure Ulcer of Skin with Full Thickness Skin Loss
0.000What This Code Means
A pressure sore on the left upper back that cannot be classified into a specific stage due to the presence of slough or eschar covering the wound.
Coding Tips
- •Use this code when the pressure ulcer stage cannot be determined because necrotic tissue obscures the wound depth
- •Do not assign a stage code if the ulcer is unstageable; these are mutually exclusive
Clinical Significance
Unstageable pressure ulcers of the left upper back indicate wound beds obscured by eschar or slough, preventing accurate depth assessment. These are clinically significant because the true severity may range from stage 3 to stage 4, requiring aggressive wound management. Risk adjustment models treat unstageable ulcers as presumed full-thickness injuries given the inability to rule out deeper involvement.
Documentation Requirements
- ✓Exact anatomical location specified as left upper back
- ✓Clinical reason why staging cannot be performed (eschar coverage, slough, non-removable dressing)
- ✓Description of wound bed appearance including color, drainage, and surrounding tissue condition
- ✓Wound dimensions (length x width) if measurable
- ✓Current treatment plan including wound care interventions
- ✓Assessment of underlying etiology (immobility, pressure, moisture)
- ✓Provider's clinical assessment and monitoring plan
Commonly Confused Codes
L89.123 — Stage 3 left upper back; use when full-thickness loss is confirmed without bone/muscle exposureL89.124 — Stage 4 left upper back; use when deep structures (bone, muscle, tendon) are exposedL89.110 — Unstageable right upper back; laterality differenceL89.129 — Unspecified stage left upper back; use when stage is simply not documented, not when staging is clinically impossible
Code Hierarchy
└L89Pressure ulcer└L89.1Pressure ulcer of back└L89.12Pressure ulcer of left upper back└L89.120Pressure ulcer of left upper back, unstageable
└L89.120Pressure ulcer of left upper back, unstageable