K12
Stomatitis and related lesions
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
K12 is a non-billable ICD-10-CM code category for stomatitis and related lesions. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are K12.0 Recurrent oral aphthae, K12.1 Other forms of stomatitis, K12.2 Cellulitis and abscess of mouth and K12.3 Oral mucositis (ulcerative). Its coding notes include a Use additional code instruction, 5 Excludes1 entries and 8 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
This code
- code to identify:
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 11 Diseases of the digestive system
- 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)