All ICD10 Codes
K12Non-billable

Stomatitis and related lesions

Diseases of the Digestive System·Diseases of oral cavity and salivary glands (K00-K14)·category·FY 2026

Use a more specific code (3 billable, 1 non-billable)
K12.0Recurrent oral aphthaeK12.1Other forms of stomatitisK12.2Cellulitis and abscess of mouthK12.3Oral mucositis (ulcerative)has subcodes

CH11 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • cancrum oris (A69.0)
  • cheilitis (K13.0)
  • gangrenous stomatitis (A69.0)
  • herpesviral [herpes simplex] gingivostomatitis (B00.2)
  • noma (A69.0)
Use Additional Code
  • code to identify:
  • alcohol abuse and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K00-K14Diseases of oral cavity and salivary glands (K00-K14)
K12Stomatitis and related lesionsNot billable
K12.0Recurrent oral aphthaeBillable
K12.1Other forms of stomatitisBillable
K12.2Cellulitis and abscess of mouthBillable
K12.3Oral mucositis (ulcerative)Subcodes

MS-DRG Classification

2026

No direct MS-DRG triggers identified.