M86.661
BillableOther chronic osteomyelitis, right 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 affecting the right shin bone (tibia) and the smaller bone next to it (fibula) that has been ongoing.
Coding Tips
- •This code specifically indicates the right lower leg; do not use if the infection is bilateral or on the left side
- •Document whether this is a recurrent infection or a continuation of a previous osteomyelitis episode
Clinical Significance
Chronic osteomyelitis of the right tibia and fibula indicates a severe, persistent bone infection in weight-bearing bones that significantly affects mobility and quality of life. This condition requires intensive medical management and carries high risk for complications including pathological fractures and treatment failure.
Documentation Requirements
- ✓Explicit documentation of chronic osteomyelitis diagnosis
- ✓Clear specification of right tibia and fibula involvement
- ✓Evidence supporting chronicity through time course or recurrence
- ✓Radiological findings consistent with chronic osteomyelitis
- ✓Microbiological cultures or biopsy results when available
- ✓Documentation of current or previous antibiotic therapy
- ✓Assessment of functional limitations and mobility impact
- ✓Presence of sequestrum, involucrum, or draining sinuses if applicable
Commonly Confused Codes
M86.661 — Acute osteomyelitis of right tibia/fibula lacks chronic time elementM87.064 — Aseptic necrosis of right tibia is bone death without bacterial infectionM86.162 — Acute osteomyelitis of right tibia/fibula represents initial infection phaseM25.561 — Pain in right lower leg doesn't indicate active bone infection
Code Hierarchy
└M86Osteomyelitis└M86.6Other chronic osteomyelitis└M86.66Other chronic osteomyelitis, tibia and fibula└M86.661Other chronic osteomyelitis, right tibia and fibula
└M86.661Other chronic osteomyelitis, right tibia and fibula