K12.1 Other forms of stomatitis

The ICD-10-CM code for Other forms of stomatitis is K12.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

11: Diseases of the digestive system (K00-K95)

Section

K00-K14: Diseases of oral cavity and salivary glands (K00-K14)

Category K12

10 codes (8 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K12.1:

• Stomatitis (denture) (ulcerative)
• Stomatitis (denture) (ulcerative) › follicular
• Stomatitis (denture) (ulcerative) › membranous acute
• Stomatitis (denture) (ulcerative) › malignant
• Stomatitis (denture) (ulcerative) › septic
• Catarrh, catarrhal (acute) (febrile) (infectious) (inflammation) › mouth
• Stomatitis (denture) (ulcerative) › catarrhal
• Inflammation, inflamed, inflammatory (with exudation) › mouth

Inclusion Terms

• Stomatitis NOS
• Denture stomatitis
• Ulcerative stomatitis
• Vesicular stomatitis

U.S. Hospital Utilization

• An estimated 14,820 U.S. inpatient stays in 2023 included K12.1 among the documented diagnoses.
• 560 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference K12.1 with the canonical source and edition:

K12.1 — Other forms of stomatitis. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/K12.1

Canonical URL: https://icd10codingpro.com/codes/K12.1