ICD-10-CM > M00-M99 > M45-M49 > M48 > M48.4 > M48.45 M48.45 Fatigue fracture of vertebra, thoracolumbar region Non-Billable/Non-Specific Codes M48.45XA..., initial encounter for fractureM48.45XD..., subsequent encounter for fracture with routine healingM48.45XG..., subsequent encounter for fracture with delayed healingM48.45XS..., sequela of fracture