ICD-10 Code A68 – Relapsing fevers (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A68 – Relapsing fevers
What it is
A68 identifies relapsing fevers, a group of recurrent febrile infections marked by repeated episodes of fever. Use this code when documentation names relapsing fever without a more specific organism or subtype.
Clinical signs
Patients typically have sudden fever episodes that recur after brief improvement. Headache, chills, muscle aches, and weakness are common; clinical features vary, so refer to documentation.
When to use this code
Use A68 when the record clearly states relapsing fever or relapsing fevers and no more specific ICD-10 code is documented. It also fits when the clinician documents the diagnosis at discharge or in the assessment, even if the exact species is not identified. Check documentation if the note only says “fever” or “recurrent fever” without naming relapsing fever.
Do not use for
Do not use A68 for nonspecific febrile illness, typhoid fever, or other confirmed infectious fevers. If the chart identifies a different organism or syndrome, code that condition instead.
Coding tip
Code the documented diagnosis exactly, and query the provider when “relapsing fever” is implied but not explicitly stated.