ICD-10 Code A68.9 – Relapsing fever, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A68.9 – Relapsing fever, unspecified
What it is
A68.9 identifies relapsing fever when the specific type is not documented. Use it for a recurrent febrile illness caused by relapsing fever infection, but without enough detail to assign a more specific code.
Clinical signs
Typical features include repeated episodes of fever with symptom-free intervals, often with headache, chills, and body aches. Clinical features vary; refer to documentation.
When to use this code
Use A68.9 when the chart clearly states relapsing fever, but the organism or form is not specified. It also fits when the provider documents a relapsing fever diagnosis without further detail needed for coding. If another relapsing fever type is named, code that specific condition instead.
Do not use for
Do not use this code for other recurrent fevers, such as malaria or nonspecific febrile illness, unless relapsing fever is documented. Check documentation if the record names a specific infectious agent.
Coding tip
Code the unspecified form only after confirming that no more specific relapsing fever diagnosis is documented.