ICD-10 Code B08.5 – Enteroviral vesicular pharyngitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B08.5 – Enteroviral vesicular pharyngitis
What it is
B08.5 identifies enteroviral vesicular pharyngitis, an acute viral infection that causes sore throat with small vesicles in the mouth or throat. It is used when the diagnosis is documented and linked to enterovirus.
Clinical signs
Typical findings include fever, sore throat, and painful vesicular or ulcerative lesions on the soft palate, tonsillar pillars, or posterior pharynx. Clinical features vary; refer to documentation.
When to use this code
Use B08.5 when the provider documents enteroviral vesicular pharyngitis, herpangina, or a clearly equivalent enteroviral throat infection. Apply it when the record supports a viral etiology and the pharyngeal vesicles are part of the diagnosis. Check documentation if the note is nonspecific.
Do not use for
Do not use this code for bacterial pharyngitis, nonspecific sore throat, or oral lesions without documented enteroviral pharyngitis. If the diagnosis is uncertain, check documentation.
Coding tip
Code the condition only when the provider names the enteroviral cause; otherwise, use the documented symptom or unspecified pharyngitis code.