ICD-10 Code A28.8 – Other specified zoonotic bacterial diseases, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A28.8 – Other specified zoonotic bacterial diseases, not elsewhere classified
What it is
This code identifies a zoonotic bacterial infection transmitted from animals or animal products that does not fit a more specific ICD-10 category. Use it when the organism or syndrome is documented, but no better code is available.
Clinical signs
Clinical features vary; refer to documentation. Findings may reflect a bacterial infection linked to animal exposure, such as localized or systemic illness, but the exact presentation depends on the specific organism.
When to use this code
Use A28.8 when the provider documents a zoonotic bacterial disease and names it as “other specified” or describes a recognized animal-associated infection without a dedicated code. It is appropriate when the record supports zoonotic transmission but the diagnosis is not otherwise classified. Check documentation if the organism is known, because a more specific code may apply.
Do not use for
Do not use this code for common bacterial infections without animal exposure, or when a more specific zoonotic code is documented. Do not assign it if the diagnosis is uncertain or not clearly bacterial.
Coding tip
Code the documented zoonotic source and organism first when available; use A28.8 only after confirming no more specific ICD-10 option fits.