2026 ICD-10-CM Diagnosis Code A69.0Necrotizing ulcerative stomatitis

ICD-10-CM Codes›A00–B99›A65-A69›A69

ICD-10-CM A69.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A69.0 is a billable ICD-10-CM diagnosis code for necrotizing ulcerative stomatitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159. Coders also document this condition as acute necrotizing stomatitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury, Diseases of mouth; excluding dental, and Nontraumatic dental conditions.

Code Identity

ICD-10-CM Code
A69.0
Billable Status
Yes — Valid for Submission
Code Describes
Necrotizing ulcerative stomatitis
Short Description
Necrotizing ulcerative stomatitis
Same as the full description in the CMS dataset.
Parent Code
A69
Other spirochetal infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA65-A69Other spirochetal diseases
CategoryA69Other spirochetal infections
This CodeA69.0Necrotizing ulcerative stomatitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute necrotizing stomatitis
  • Cancrum oris
  • Neonatal disorder of oral mucosa
  • Noma neonatorum

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Cancrum oris
  • Fusospirochetal gangrene
  • Noma
  • Stomatitis gangrenosa

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Cancrum oris
    • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
      • fusospirochetal
    • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
      • mouth
    • Gangrene, gangrenous(connective tissue) (dropsical) (dry) (moist) (skin) (ulcer)
      • stomatitis
    • Necrosis, necrotic(ischemic)
      • stomatitis (ulcerative)
    • Noma(gangrenous) (hospital) (infective)
    • Noma(gangrenous) (hospital) (infective)
      • mouth
    • Stomatitis(denture) (ulcerative)
      • gangrenous
    • Stomatitis(denture) (ulcerative)
      • necrotizing ulcerative

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG003
Diseases of mouth; excluding dental
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Bacterial Infections

Bacteria are tiny organisms (living things) that have only one cell. Under a microscope, they look like balls, rods, or spirals. They can be found almost everywhere on Earth. There are lots of bacteria in and on your body. In fact, your body has about 10 times more bacteria cells than human cells.

The full article covers:

  • What are bacteria?
  • How do bacterial infections spread?
  • What are the treatments for bacterial infections?
  • Can bacterial infections be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A69.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
101 Vincent's angina
Approximate The match is approximate rather than exact.
ICD-9-CM
528.1 Cancrum oris
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A69.0Overview

Is A69.0 (Other spirochetal infections) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report necrotizing ulcerative stomatitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A69.0 group to?

When necrotizing ulcerative stomatitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, with relative weights from 0.7085 to 1.7168 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A69.0?

Under the General Equivalence Mappings, necrotizing ulcerative stomatitis converts to ICD-9-CM 101 (Vincent's angina) and 528.1 (cancrum oris). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.