A69.0

🧬ICD-10 CM A69.0 - Necrotizing ulcerative stomatitis**

Description

• Definition: A severe, gangrenous infection of the mouth and face, often progressing rapidly to destroy soft tissue and bone. It is a type of spirochetal infection.
• Includes (Synonyms):
  • Cancrum oris
  • Fusospirochetal gangrene
  • Noma
  • Stomatitis gangrenosa
• Category: Other spirochetal infections (A69.-).

Body area

Primary anatomic site: Oral cavity—stomatitis involving oral mucosa/gingiva.​

Includes / Excludes (Tabular)

Includes (at code level):

• Cancrum oris (noma).​

• Fusospirochetal gangrene.​

• Stomatitis gangrenosa.​

Excludes1:

No Excludes1 note is shown at the A69.0 code line in the provided ICD-10-CM tabular excerpt.​

Excludes2:

No Excludes2 note is shown at the A69.0 code line in the provided ICD-10-CM tabular excerpt.

Risk Adjustment (HCC) Status

• HCC Weight: No.
• Clinical Note: This code generally does not map to a Hierarchical Condition Category (HCC) for risk adjustment purposes. It is typically categorized as an acute infectious condition.

Common Associated CPT Codes

1. Evaluation & Management (E/M)

• 99202-99215: Office or other outpatient visits.
  • Note: Medical Decision Making (MDM) is often High (99205/99215) due to the severe threat to body function (gangrene) and the need for immediate, possibly parenteral, antibiotics or surgical intervention.

2. Surgical Procedures

• 40808: Biopsy, vestibule of mouth.
  • Usage: To rule out malignancy or confirm specific infectious agents if the diagnosis is unclear.
• 11042-11047: debridement, subcutaneous tissue/muscle/bone.
  • Usage: Noma/Cancrum oris frequently requires extensive debridement of necrotic tissue. Select the code based on the depth of tissue removed (e.g., subcutaneous vs. muscle).
• 40800/40801: Drainage of abscess, cyst, hematoma, vestibule of mouth.

Coding Guidelines & Specificity Alerts

• Coding the Organism: The code A69.0 falls under “Other spirochetal infections.” If a specific bacterial agent is identified (e.g., Fusobacterium), you may need to add a code from B96.- (Other bacterial agents) to identify the organism.
• Exclusions:
  • A69.1: Other Vincent’s infections (includes Necrotizing ulcerative gingivitis/gingivostomatitis/trench mouth). Note: Use A69.1 for “trench mouth” or Vincent’s angina; use A69.0 for the more severe “gangrenous” or “noma” presentation.
  • A69.0 is distinct from L08.0 (Dermatitis gangrenosa).

Documentation Checklist

• Severity: Explicitly document terms like “gangrene,” “necrosis,” or “noma” to distinguish this from simple stomatitis or gingivitis.
• Site: Clearly document the involvement of the mouth, cheeks, or lips.
• Underlying Cause: Document any malnutrition or immunosuppression (e.g., HIV, severe protein deficiency) often associated with this condition, as those conditions do carry HCC weight.

Common modifiers (CPT)

Modifiers don’t apply to an ICD-10-CM diagnosis code, but if you’re pairing A69.0 with common E/M or procedure CPTs, these are frequently used modifiers:​

• 25 (Significant, separately identifiable E/M on same day as a procedure).​

• 59 / X{E,P,S,U} (Distinct procedural service; payer-specific preference).​

• 24 (Unrelated E/M during postop period), 57 (Decision for surgery), 79 (Unrelated procedure during postop)​

Common CPT pairings (examples)

Actual CPT selection depends on setting/severity and what’s documented (evaluation, debridement, I&D, hospitalization).​

• Office/Outpatient E/M (e.g., 99212-99215 or 99202-99205) when evaluating oral necrotizing infection​

• ED E/M (e.g., 99281-99285) for acute/severe presentations.​

• Procedures may apply if there’s abscess drainage/debridement documented (choose the exact code based on site/extent).​

Example coding scenario

Example: Patient presents with rapidly progressive necrotizing ulceration of oral mucosa documented as “noma/cancrum oris”; clinician diagnoses necrotizing ulcerative stomatitis → assign A69.0 for the diagnosis.