M87.176
BillableOsteonecrosis due to drugs, unspecified foot
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
Bone death in the foot caused by medication side effects, with the specific foot not identified.
Coding Tips
- •Verify which medication caused the osteonecrosis and document it in the medical record
- •If the specific foot (right or left) is documented, use M87.175 or M87.176 instead for greater specificity
Clinical Significance
Drug-induced osteonecrosis of unspecified foot represents medication-related bone death when laterality cannot be determined from documentation. This condition indicates significant functional impairment potential and requires comprehensive podiatric evaluation despite the side specification limitation.
Documentation Requirements
- ✓Documentation confirming foot involvement in osteonecrosis process
- ✓Specific causative medication or drug class identification
- ✓Imaging evidence demonstrating foot bone necrosis
- ✓Assessment of foot structure and weight-bearing capacity
- ✓Rationale for why laterality cannot be determined
- ✓Drug exposure history with temporal relationship to symptoms
- ✓Treatment approach addressing functional preservation
- ✓Provider confirmation of drug-induced etiology
Commonly Confused Codes
M87.174/M87.175 — Use specific laterality when right/left is documentedM87.173 — Unspecified ankle limited to ankle joint involvementM87.179 — Unspecified toe osteonecrosis more specific than footM87.276 — Post-traumatic unspecified foot requires injury historyM87.076 — Idiopathic foot osteonecrosis lacks drug causation
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.17Osteonecrosis due to drugs, ankle, foot and toes└M87.176Osteonecrosis due to drugs, unspecified foot
└M87.176Osteonecrosis due to drugs, unspecified foot