ICD-10 Code A69.9 – Spirochetal infection, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A69.9 – Spirochetal infection, unspecified
What it is
A69.9 identifies a spirochetal infection when the organism or specific disease is not documented. Use it for infections caused by spirochetes when the record does not name a more precise diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Spirochetal infections may present with systemic illness, skin findings, neurologic involvement, or other organ-specific manifestations depending on the cause.
When to use this code
Use A69.9 when the provider documents a spirochetal infection but does not specify the exact type, such as a named organism or disease entity. It also fits when the chart confirms a spirochetal infection and the documentation remains nonspecific after review.
If the record later identifies a specific spirochetal disease, report the more specific code instead. Check documentation carefully for organism names, clinical diagnosis, or site-specific terms that support a different code.
Do not use for
Do not use this code for a clearly identified spirochetal disease that has a more specific ICD-10-CM code. Do not use it when the note only suggests an infection without confirming a spirochetal cause.
Coding tip
Query the provider whenever the organism is implied but not named, because specificity may change the code selection.