ICD-10 Code B08.03 – Pseudocowpox [milker’s node] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B08.03 – Pseudocowpox [milker’s node]
What it is
B08.03 identifies pseudocowpox, also called milker’s node, a contagious parapoxvirus infection usually acquired from infected cattle or contaminated animal material. It typically causes a localized skin lesion on the hands or fingers.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you may see a firm, raised nodule or papule that can become crusted or ulcerated, often on an exposed hand after animal contact.
When to use this code
Use B08.03 when the provider documents pseudocowpox, milker’s node, or parapoxvirus infection from cattle exposure. It fits a confirmed or clearly documented clinical diagnosis, especially when the lesion is linked to occupational animal contact.
Do not infer the diagnosis from a nonspecific hand lesion alone. If the record only states a viral rash, skin infection, or occupational exposure without naming pseudocowpox, check documentation.
Do not use for
Do not use this code for unrelated hand warts, bacterial skin infections, or other poxvirus conditions unless pseudocowpox is specifically documented. Check documentation for the exact diagnosis.
Coding tip
Confirm the animal exposure and the provider’s exact wording before assigning B08.03.