M87.172
BillableOsteonecrosis due to drugs, left ankle
HCC Category Mapping
V24HCC 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 caused by medication side effects, potentially compromising ankle stability and function.
Coding Tips
- •Document the specific ankle bone affected (talus, calcaneus, etc.) if available for clinical clarity
- •Ensure the drug-induced relationship is clearly established in the medical record
Clinical Significance
Drug-induced osteonecrosis of the left ankle represents medication-related bone death affecting the weight-bearing joint, with potential severe impact on mobility and independence. This condition requires comprehensive evaluation and may necessitate complex surgical intervention to preserve joint function and prevent disability.
Documentation Requirements
- ✓Clear documentation of left ankle involvement in osteonecrosis
- ✓Specific causative medication with exposure timeline
- ✓Imaging evidence of left ankle osteonecrosis
- ✓Assessment of joint stability and weight-bearing capacity
- ✓Documentation of functional limitations and mobility impact
- ✓Drug exposure duration and relationship to symptom onset
- ✓Comprehensive treatment plan including surgical considerations
- ✓Provider documentation establishing drug-induced etiology
Commonly Confused Codes
M87.171 — Right ankle osteonecrosis, opposite sideM87.173 — Unspecified ankle when left side is documentedM87.175 — Left foot osteonecrosis involves broader foot structuresM87.272 — Post-traumatic left ankle requires trauma historyM19.072 — Primary ankle osteoarthritis is joint degeneration, not necrosis
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.17Osteonecrosis due to drugs, ankle, foot and toes└M87.172Osteonecrosis due to drugs, left ankle
└M87.172Osteonecrosis due to drugs, left ankle