M86.179
BillableOther acute osteomyelitis, unspecified ankle and foot
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 rapidly developing bone infection in the ankle and foot area, but the specific side is not documented.
Coding Tips
- •Attempt to obtain laterality information from clinical documentation or imaging reports
- •Use this code only when side cannot be determined despite documentation review
Clinical Significance
Acute osteomyelitis of unspecified ankle and foot represents incomplete documentation of a complex multi-bone infection affecting weight-bearing structures. The foot's complex anatomy and functional importance make laterality specification crucial for treatment planning and prognosis assessment.
Documentation Requirements
- ✓Documentation of ankle/foot bone infection without laterality
- ✓Evidence of acute infection in foot/ankle bones
- ✓Clinical presentation of complex foot bone infection
- ✓Imaging confirmation of ankle/foot involvement
- ✓Laboratory evidence of active bone infection
- ✓Provider query for laterality specification
- ✓Assessment of weight-bearing and gait impact
- ✓Treatment plan for complex foot anatomy
Commonly Confused Codes
L03.119 — Cellulitis of unspecified lower limb (soft tissue)M86679 — Chronic osteomyelitis with draining sinus of unspecified ankle and footM86279 — Subacute osteomyelitis of unspecified ankle and footM86171/172 — Right/left specific codes when laterality availableS92.909A — Unspecified fracture of unspecified foot
Code Hierarchy
└M86Osteomyelitis└M86.1Other acute osteomyelitis└M86.17Other acute osteomyelitis, ankle and foot└M86.179Other acute osteomyelitis, unspecified ankle and foot
└M86.179Other acute osteomyelitis, unspecified ankle and foot