M87.878

Billable

Other osteonecrosis, left toe(s)

HCC Category Mapping

V28HCC 92 — Bone/Joint/Muscle Infections/Necrosis

0.209

V24HCC 39 — Bone/Joint/Muscle Infections/Necrosis

0.482

ESRDHCC 39 — Bone/Joint/Muscle Infections/Necrosis

0.000

RxHCCHCC 80 — Bone/Joint/Muscle Infections/Necrosis

0.000

What This Code Means

Death of bone tissue in the left toe(s) due to causes other than trauma, infection, or radiation. This can cause pain and difficulty walking or wearing shoes.

Coding Tips

•This code is specific to the left toe(s); use M87.877 for right toe(s) or M87.879 for unspecified
•Document which toe(s) are affected if possible, though this code does not differentiate between individual toes

Clinical Significance

Left toe osteonecrosis represents avascular bone death in the toe bones, potentially disrupting normal gait mechanics and balance. This condition requires careful management to prevent complications and preserve foot function, especially in patients with comorbid conditions like diabetes.

Documentation Requirements

✓Clear documentation of left toe(s) involvement
✓Radiological evidence of bone necrosis in affected toes
✓Exclusion of traumatic, infectious, or radiation-induced etiology
✓Gait analysis and balance assessment impact
✓Pain quantification and mobility limitations
✓Screening for underlying vascular or metabolic conditions
✓Specialized footwear and orthotic recommendations
✓Regular monitoring for secondary complications

Commonly Confused Codes

M87.378 — Drug-induced osteonecrosis requires specific agent identification M87.178 — Post-traumatic osteonecrosis needs trauma documentation M87.078 — Idiopathic osteonecrosis has no identifiable precipitating factors S92.502A — Left toe fracture is acute injury code M20.12 — Hallux valgus is structural deformity, not bone death

Code Hierarchy

└M87Osteonecrosis └M87.8Other osteonecrosis └M87.87Other osteonecrosis, ankle, foot and toes └M87.878Other osteonecrosis, left toe(s)

└M87.878Other osteonecrosis, left toe(s)