M87.179
BillableOsteonecrosis due to drugs, unspecified toe(s)
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 toe(s) caused by medication side effects, with the specific foot not identified.
Coding Tips
- •Use only when the foot side (right or left) cannot be determined from documentation
- •Query the provider if laterality information is available to allow for more specific coding
Clinical Significance
Drug-induced osteonecrosis of unspecified toe(s) represents medication-related bone death when laterality is not documented, indicating need for improved documentation specificity. This condition requires immediate evaluation of causative medications and can significantly impact mobility and weight-bearing function if not properly managed.
Documentation Requirements
- ✓Documentation of toe involvement without laterality specification
- ✓Clear identification of drug-induced etiology
- ✓Documentation of causative medication(s)
- ✓Imaging evidence of toe osteonecrosis
- ✓Timeline establishing drug exposure relationship
- ✓Assessment of functional impact on ambulation
- ✓Evidence that laterality determination was not possible
- ✓Medication review and modification planning
Commonly Confused Codes
M87.177 — Drug-induced osteonecrosis of right toe(s) (use when laterality known)M87.178 — Drug-induced osteonecrosis of left toe(s) (use when laterality known)M87.079 — Idiopathic osteonecrosis of unspecified toe(s) (no drug cause)M87.279 — Trauma-related osteonecrosis of unspecified toe(s) (injury-related)M87.379 — Other secondary osteonecrosis of unspecified toe(s) (different cause)
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.17Osteonecrosis due to drugs, ankle, foot and toes└M87.179Osteonecrosis due to drugs, unspecified toe(s)
└M87.179Osteonecrosis due to drugs, unspecified toe(s)