K12.0

Billable

ChapterK00–K95

Ranksubcategory

Official Description

Recurrent oral aphthae

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 11: Diseases of the Digestive System (K00-K95).

Instructional Notes

Includes

Aphthous stomatitis (major) (minor)
Bednar's aphthae
Periadenitis mucosa necrotica recurrens
Recurrent aphthous ulcer
Stomatitis herpetiformis

General instructions are available for the parent sections:

View CH11 Notes View K12 Notes

Clinical Hierarchy

CH11Diseases of the digestive system (K00-K95)

K00-K14Diseases of oral cavity and salivary glands (K00-K14)

K12Stomatitis and related lesions

K12.0Recurrent oral aphthae

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K12.0:

categoryK12

Stomatitis and related lesions

View context instructions

chapterCH11

Diseases of the digestive system (K00-K95)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to K12.0. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

11 raw paths

Aphthae, aphthous4 unique routes

Bednar's→K12.0

oral (recurrent)→K12.0

stomatitis (major) (minor)→K12.0

ulcer (oral) (recurrent)→K12.0

Bednar's1 unique routes

aphthae→K12.0

Canker (mouth) (sore)1 unique routes

Direct index entry→K12.0

Periadenitis mucosa necrotica recurrens1 unique routes

Direct index entry→K12.0

Sore1 unique routes

mouth

canker→K12.0

Stomatitis (denture) (ulcerative)2 unique routes

aphthous→K12.0

herpetiformis→K12.0

Ulcer, ulcerated, ulcerating, ulceration, ulcerative1 unique routes

aphthous (oral) (recurrent)→K12.0

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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