M87.171
BillableOsteonecrosis due to drugs, right 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 right ankle caused by medication side effects, potentially affecting mobility and joint function.
Coding Tips
- •Verify whether the osteonecrosis affects the talus or other ankle bones and document accordingly
- •Correlate with imaging findings to confirm drug-induced etiology versus other causes
Clinical Significance
Drug-induced osteonecrosis of the right ankle involves medication-related bone death affecting the complex joint structure, potentially compromising mobility and weight-bearing capacity. This condition may require specialized orthopedic intervention and can significantly impact daily activities and ambulation.
Documentation Requirements
- ✓Specific documentation of right ankle involvement in osteonecrosis
- ✓Causative medication identification with exposure details
- ✓Advanced imaging confirming ankle osteonecrosis
- ✓Assessment of ankle joint function and range of motion
- ✓Documentation of weight-bearing limitations and gait abnormalities
- ✓Drug therapy timeline and correlation with symptom development
- ✓Treatment plan including bracing, therapy, or surgical options
- ✓Provider statement establishing drug-induced etiology
Commonly Confused Codes
M87.172 — Left ankle osteonecrosis, opposite lateralityM87.173 — Unspecified ankle when right side is documentedM87.174 — Right foot osteonecrosis involves broader foot structuresM87.271 — Post-traumatic right ankle requires injury historyS93.4 — Acute ankle sprain is soft tissue injury, not bone necrosis
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.17Osteonecrosis due to drugs, ankle, foot and toes└M87.171Osteonecrosis due to drugs, right ankle
└M87.171Osteonecrosis due to drugs, right ankle