M90.562
BillableOsteonecrosis in diseases classified elsewhere, left lower leg
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 lower leg caused by another disease. The bone tissue in the lower leg 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; do not use this code for right-sided or bilateral involvement
Clinical Significance
This diagnosis represents secondary osteonecrosis affecting the left lower leg bones (tibia/fibula), indicating bone death caused by an underlying systemic disease condition. The diagnosis requires intensive medical management and significantly impacts risk adjustment due to mobility concerns and functional limitations.
Documentation Requirements
- ✓Documentation of underlying classified disease causing the osteonecrosis
- ✓Specific identification of left lower leg (tibia/fibula) as affected site
- ✓Imaging studies confirming bone necrosis (MRI, bone scan, or CT)
- ✓Provider documentation establishing causal relationship to primary disease
- ✓Comprehensive treatment approach for both conditions
- ✓Weight-bearing assessment and mobility evaluation
- ✓Clinical notes excluding primary or traumatic causes of bone death
- ✓Monitoring documentation for progression and treatment response
Commonly Confused Codes
M87.062 — Primary osteonecrosis of left tibia, not caused by another diseaseM90.561 — Same condition but affecting right lower leg rather than leftM86.162 — Chronic osteomyelitis of left tibia, which involves infectionS82.92XA — Fracture of left lower leg, which is acute trauma-relatedM70.063 — Trochanteric bursitis of left leg, which affects soft tissue rather than bone
Code Hierarchy
└M90Osteopathies in diseases classified elsewhere└M90.5Osteonecrosis in diseases classified elsewhere└M90.56Osteonecrosis in diseases classified elsewhere, lower leg└M90.562Osteonecrosis in diseases classified elsewhere, left lower leg
└M90.562Osteonecrosis in diseases classified elsewhere, left lower leg