M86.669
BillableOther chronic osteomyelitis, unspecified tibia and 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
0.000What This Code Means
A chronic bone infection in the shin bone (tibia) and fibula where the specific side (left or right) is not specified.
Coding Tips
- •Only use this unspecified code when laterality cannot be determined from available documentation
- •Query the provider if documentation is unclear about whether the infection is unilateral or bilateral
Clinical Significance
Chronic osteomyelitis of unspecified tibia and fibula indicates a persistent bone infection in critical weight-bearing bones where laterality is not documented. This represents significant morbidity requiring extensive antibiotic therapy and potential surgical intervention, with high risk for treatment complications and functional impairment.
Documentation Requirements
- ✓Documentation of chronic osteomyelitis diagnosis
- ✓Evidence that tibia and/or fibula are involved
- ✓Proof of chronicity through time course or treatment history
- ✓Imaging studies confirming osteomyelitis
- ✓Laboratory studies supporting infection diagnosis
- ✓Treatment plan including antibiotics or surgical intervention
- ✓Assessment of functional impact on mobility
- ✓Documentation explaining why laterality cannot be determined
Commonly Confused Codes
Code Hierarchy
└M86Osteomyelitis└M86.6Other chronic osteomyelitis└M86.66Other chronic osteomyelitis, tibia and fibula└M86.669Other chronic osteomyelitis, unspecified tibia and fibula
└M86.669Other chronic osteomyelitis, unspecified tibia and fibula