ICD-10-CM > M00-M99 > M45-M49 > M48 > M48.4 > M48.43 M48.43 Fatigue fracture of vertebra, cervicothoracic region Non-Billable/Non-Specific Codes M48.43XA..., initial encounter for fractureM48.43XD..., subsequent encounter for fracture with routine healingM48.43XG..., subsequent encounter for fracture with delayed healingM48.43XS..., sequela of fracture