M87.872
BillableOther osteonecrosis, left ankle
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 left ankle joint due to causes other than trauma or radiation.
Coding Tips
- •Confirm left ankle is documented in the clinical record
- •Ankle osteonecrosis often affects the talus; document the specific bone if identifiable
Clinical Significance
Left ankle osteonecrosis involves avascular bone death in a major weight-bearing joint, creating substantial risk for joint collapse and disability. This condition demands intensive orthopedic management and may ultimately require surgical intervention including joint fusion or replacement.
Documentation Requirements
- ✓Clear specification of left ankle involvement
- ✓Diagnostic imaging confirming osteonecrosis (MRI gold standard)
- ✓Documentation excluding traumatic, infectious, or radiation etiology
- ✓Functional assessment including gait analysis
- ✓Pain quantification and impact on activities of daily living
- ✓Risk factor evaluation (steroids, alcohol, autoimmune conditions)
- ✓Multidisciplinary care plan including orthopedics and physical therapy
- ✓Disease staging and prognosis documentation
Commonly Confused Codes
M87.372 — Drug-induced osteonecrosis requires causative agent identificationM87.172 — Traumatic osteonecrosis needs documented injury historyM87.072 — Idiopathic osteonecrosis lacks identifiable precipitating factorsM19.072 — Primary ankle osteoarthritis is wear-related, not avascularM25.572 — Joint pain is symptomatic, not structural bone death
Code Hierarchy
└M87Osteonecrosis└M87.8Other osteonecrosis└M87.87Other osteonecrosis, ankle, foot and toes└M87.872Other osteonecrosis, left ankle
└M87.872Other osteonecrosis, left ankle