M87.178
BillableOsteonecrosis due to drugs, left 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 the toes of the left foot caused by medication side effects.
Coding Tips
- •Ensure laterality is clearly documented as left in the medical record
- •Consider if the patient has bilateral involvement; if so, code both M87.177 and M87.178
Clinical Significance
Drug-induced osteonecrosis of left toe(s) indicates medication-related bone death in the digits requiring immediate assessment of causative agents and treatment modifications. This condition can severely compromise weight-bearing capacity and mobility, potentially leading to chronic pain and functional impairment requiring multidisciplinary management.
Documentation Requirements
- ✓Specific documentation of left toe(s) involvement
- ✓Clear identification of drug-induced etiology
- ✓Documentation of causative medication(s)
- ✓Imaging studies confirming toe osteonecrosis
- ✓Temporal relationship between drug exposure and onset
- ✓Assessment of ambulation and weight-bearing impact
- ✓Specification of number of toes if multiple affected
- ✓Treatment plan including medication modification
Commonly Confused Codes
M87.078 — Idiopathic osteonecrosis of left toe(s) (unknown cause)M87.278 — Trauma-related osteonecrosis of left toe(s) (injury-related)M87.378 — Other secondary osteonecrosis of left toe(s) (different secondary cause)M87.177 — Drug-induced osteonecrosis of right toe(s) (wrong laterality)E11.621 — Type 2 diabetes with foot ulcer (different pathology)
Code Hierarchy
└M87Osteonecrosis└M87.1Osteonecrosis due to drugs└M87.17Osteonecrosis due to drugs, ankle, foot and toes└M87.178Osteonecrosis due to drugs, left toe(s)
└M87.178Osteonecrosis due to drugs, left toe(s)