ICD-10 Code B00.2 – Herpesviral gingivostomatitis and pharyngotonsillitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B00.2 – Herpesviral gingivostomatitis and pharyngotonsillitis
What it is
B00.2 identifies herpes simplex infection affecting the mouth, gums, throat, or tonsils. Use it when documentation states herpesviral gingivostomatitis, pharyngotonsillitis, or a similar oral HSV presentation.
Clinical signs
Typical findings include painful oral ulcers, inflamed gums, sore throat, and difficulty swallowing. Clinical features vary; refer to documentation for confirmed herpesviral involvement.
When to use this code
Use B00.2 when the provider documents herpesviral gingivostomatitis, herpesviral pharyngotonsillitis, or oral herpes infection with these sites clearly identified. It fits acute visits for mouth and throat lesions attributed to herpes simplex. Check documentation if the note only says “herpes” or “stomatitis” without site or viral cause.
Do not use for
Do not use this code for nonherpetic stomatitis, aphthous ulcers, or unspecified oral lesions. If the record does not confirm herpesviral disease, check documentation.
Coding tip
Code B00.2 only when the herpesviral site is documented; otherwise, query for a more specific diagnosis.