ICD-10 Code A21.8 – Other forms of tularemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A21.8 – Other forms of tularemia
What it is
A21.8 identifies tularemia that does not fit the more specific ICD-10 categories. Use it for documented Francisella tularensis infection when the record describes another form or does not specify a different subtype.
Clinical signs
Clinical features vary; refer to documentation. Tularemia may present with fever, chills, malaise, and localized lymph node swelling or ulceration, depending on the exposure route and form of infection.
When to use this code
Use A21.8 when the clinician documents tularemia but the chart does not support a more specific code. It also fits cases described as “other” or atypical forms of tularemia. Check documentation if the record suggests pneumonic, oculoglandular, or another specified type.
Do not use for
Do not use A21.8 when the provider documents a specific tularemia subtype that has its own code. Do not assign it if tularemia is only suspected or ruled out.
Coding tip
Code the most specific tularemia form documented; if the subtype is unclear, A21.8 is the fallback.