M87.876
BillableOther osteonecrosis, unspecified foot
HCC Category Mapping
V28HCC 92 — Bone/Joint/Muscle Infections/Necrosis
0.209V24HCC 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 an unspecified foot due to causes other than trauma, infection, or radiation. This condition can lead to pain, limited mobility, and potential complications if untreated.
Coding Tips
- •Specify the laterality (right vs. left foot) when documented; use M87.875 for right foot or M87.876 for left foot if specified
- •Investigate the underlying cause of osteonecrosis (idiopathic, corticosteroid use, sickle cell disease) as it may require additional coding
Clinical Significance
Unspecified foot osteonecrosis represents avascular bone death affecting foot structures without documented laterality, potentially indicating bilateral involvement or incomplete documentation. This condition significantly impacts weight-bearing and mobility, requiring comprehensive foot care management.
Documentation Requirements
- ✓Documentation of foot osteonecrosis without laterality specification
- ✓Bilateral foot imaging if both feet potentially affected
- ✓Exclusion of trauma, infection, and radiation as causes
- ✓Assessment of bilateral weight-bearing if applicable
- ✓Pain evaluation and ambulatory capacity
- ✓Underlying condition screening and management
- ✓Coordinated care with foot and ankle specialists
- ✓Adaptive equipment and mobility aid assessment
Commonly Confused Codes
M87.376 — Drug-induced osteonecrosis requires medication causation documentationM87.176 — Traumatic osteonecrosis needs clear injury historyM87.076 — Idiopathic osteonecrosis lacks identifiable underlying etiologyM19.079 — Unspecified foot osteoarthritis is degenerative joint diseaseM79.673 — Foot pain is symptomatic condition, not structural bone death
Code Hierarchy
└M87Osteonecrosis└M87.8Other osteonecrosis└M87.87Other osteonecrosis, ankle, foot and toes└M87.876Other osteonecrosis, unspecified foot
└M87.876Other osteonecrosis, unspecified foot