ICD-10-CM > A00-B99 > A65-A69 > A68 A68 Relapsing fevers Non-Billable/Non-Specific Includes recurrent fever Type 2 Excludes Lyme disease (A69.2-) Codes A68.0Louse-borne relapsing feverA68.1Tick-borne relapsing feverA68.9Relapsing fever, unspecified