ICD-10 Code A28.1 – Cat-scratch disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A28.1 – Cat-scratch disease
What it is
A28.1 identifies cat-scratch disease, a bacterial infection usually linked to a scratch or bite from a cat. Use it when the record clearly documents this diagnosis.
Clinical signs
Typical findings include a papule or pustule at the inoculation site, followed by regional lymph node swelling and tenderness. Fever or malaise may occur; clinical features vary, so refer to documentation.
When to use this code
Use A28.1 when the provider documents cat-scratch disease, cat-scratch fever, or infection due to Bartonella henselae consistent with this condition. Code it from confirmed assessment, not from exposure alone. If the chart only notes lymphadenopathy or a cat scratch without diagnosis, check documentation.
Do not use for
Do not assign this code for a simple scratch, bite, or wound without diagnosed cat-scratch disease. Do not use it when another specific infection explains the findings.
Coding tip
Confirm the provider’s final diagnosis and avoid coding from symptoms or exposure history alone.