M87.165
BillableOsteonecrosis due to drugs, left fibula
HCC Category Mapping
V24HCC 39 — Bone/Joint/Muscle Infections/Necrosis
0.482ESRDHCC 39 — Bone/Joint/Muscle Infections/Necrosis
0.000RxHCCHCC 80 — Bone/Joint/Muscle Infections/Necrosis
0.000What This Code Means
Death of bone tissue in the left fibula (smaller bone in the lower leg) caused by medication side effects, leading to potential bone collapse.
Coding Tips
- •Confirm left fibula involvement through imaging reports or clinical examination documentation
- •Link this diagnosis to the specific medication in the patient's medication history for complete clinical context
Clinical Significance
Drug-induced osteonecrosis of the left fibula involves medication-related bone death in the lateral support bone of the lower leg, potentially affecting ankle stability and overall lower extremity biomechanics. This condition requires orthopedic assessment and management to prevent complications and preserve function.
Documentation Requirements
- ✓Clear documentation of left fibula involvement in osteonecrosis
- ✓Specific causative medication with exposure timeline
- ✓Imaging evidence of left fibular osteonecrosis
- ✓Assessment of ankle function and lateral leg stability
- ✓Documentation of functional limitations and mobility impact
- ✓Drug exposure duration and relationship to symptom onset
- ✓Treatment plan including conservative and surgical options
- ✓Provider documentation establishing drug-induced etiology
Commonly Confused Codes
M87.162 — Left tibia osteonecrosis affects major weight-bearing boneM87.164 — Right fibula osteonecrosis, opposite sideM87.166 — Unspecified fibula when left side is documentedM87.265 — Post-traumatic left fibula requires trauma historyM87.065 — Idiopathic left fibula osteonecrosis lacks drug causation
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.16Osteonecrosis due to drugs, tibia and fibula└M87.165Osteonecrosis due to drugs, left fibula
└M87.165Osteonecrosis due to drugs, left fibula