ICD-10 Code A69.0 – Necrotizing ulcerative stomatitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A69.0 – Necrotizing ulcerative stomatitis
What it is
A69.0 identifies necrotizing ulcerative stomatitis, a severe infectious condition affecting the mouth. It involves tissue destruction and ulceration of the oral mucosa, often with rapid progression.
Clinical signs
Typical findings include painful oral ulcers, necrotic tissue, and foul breath. Clinical features vary; refer to documentation for extent, severity, and whether gingival involvement is present.
When to use this code
Use this code when the record clearly documents necrotizing ulcerative stomatitis as the diagnosis. It is appropriate for encounters focused on this oral infection, including evaluation, follow-up, or complication assessment. Check documentation if the note uses broader terms such as stomatitis or oral ulceration without confirmation.
Do not use for
Do not use this code for nonspecific mouth sores, aphthous ulcers, or other stomatitis types unless necrotizing ulcerative stomatitis is documented. Check documentation when the diagnosis is uncertain.
Coding tip
Code only when the provider names the necrotizing ulcerative process explicitly; otherwise, query or use the documented oral condition.