M90.572
BillableOsteonecrosis in diseases classified elsewhere, left 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
0.000RxHCCHCC 80 — Bone/Joint/Muscle Infections/Necrosis
0.000What This Code Means
Bone death (osteonecrosis) in the left ankle and foot caused by another disease. The bone tissue in the ankle and foot dies as a secondary effect of an underlying condition.
Coding Tips
- •Requires a secondary diagnosis code for the underlying disease causing the osteonecrosis
- •Laterality is specified as left; covers both ankle and foot structures on the left side
Clinical Significance
This diagnosis represents secondary osteonecrosis affecting the left ankle and foot bones, indicating tissue death caused by an underlying systemic disease. The condition requires comprehensive medical management and has significant risk adjustment implications due to impact on mobility and weight-bearing function.
Documentation Requirements
- ✓Clear documentation of underlying disease causing secondary osteonecrosis
- ✓Specific identification of left ankle and/or foot as affected anatomical sites
- ✓Radiological confirmation of osteonecrotic changes (MRI, bone scan, CT)
- ✓Provider statement establishing causal relationship to classified disease
- ✓Treatment plan addressing both primary condition and bone necrosis
- ✓Assessment of ambulatory status and weight-bearing limitations
- ✓Documentation excluding primary or traumatic causes of bone death
- ✓Monitoring documentation for healing progress and complications
Commonly Confused Codes
M87.072 — Primary osteonecrosis of left ankle and foot, not caused by diseaseM90.571 — Same condition but affecting right ankle and foot rather than leftM86.172 — Chronic osteomyelitis of left ankle and foot involving infectionS92.92XA — Fracture of left foot, which is acute trauma-relatedM70.073 — Trochanteric bursitis affecting left foot area, which is soft tissue inflammation
Code Hierarchy
└M90Osteopathies in diseases classified elsewhere└M90.5Osteonecrosis in diseases classified elsewhere└M90.57Osteonecrosis in diseases classified elsewhere, ankle and foot└M90.572Osteonecrosis in diseases classified elsewhere, left ankle and foot
└M90.572Osteonecrosis in diseases classified elsewhere, left ankle and foot