M87.066
BillableIdiopathic aseptic necrosis of unspecified fibula
HCC Category Mapping
V28HCC 92 — Bone/Joint/Muscle Infections/Necrosis
0.209V24HCC 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 fibula without infection and without a known cause, when the side is not specified.
Coding Tips
- •Use this code only when laterality cannot be determined from documentation
- •Query the provider if laterality is documented elsewhere in the record to assign a more specific code
Clinical Significance
Idiopathic aseptic necrosis of unspecified fibula indicates bone death without infection in the fibula where laterality is not documented. This condition affects the stability bone of the lower leg and can compromise weight-bearing function, requiring careful monitoring for progression and potential surgical intervention to prevent complications.
Documentation Requirements
- ✓Documentation of aseptic necrosis affecting fibula
- ✓Evidence of idiopathic etiology (no identifiable cause)
- ✓Imaging confirmation of bone necrosis without infection
- ✓Explanation for unspecified laterality
- ✓Exclusion of known causes of osteonecrosis
- ✓Assessment of lower leg function and stability
- ✓Treatment plan addressing bone death
- ✓Documentation ruling out infectious processes
Commonly Confused Codes
Code Hierarchy
└M87Osteonecrosis└M87.0Idiopathic aseptic necrosis of bone└M87.06Idiopathic aseptic necrosis of tibia and fibula└M87.066Idiopathic aseptic necrosis of unspecified fibula
└M87.066Idiopathic aseptic necrosis of unspecified fibula