ICD-10 Code
International Classification of Diseases, 10th Revision
Oct 18, 2018

See: Stomatitis and related lesions

K12 is NOT a complete or valid ICD 10 diagnosis code.

You should code each health care encounter to the level of certainty known for that encounter. When sufficient clinical information is not known or available to assign a more specific code, it is acceptable to report the appropriate unspecified code.

See below for more specifc codes relating to
Stomatitis and related lesions
Use Additional Code
  • alcohol abuse and dependence (F10.-)
  • code to identify:
  • 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)
  • cancrum oris (A69.0)
  • cheilitis (K13.0)
  • gangrenous stomatitis (A69.0)
  • herpesviral [herpes simplex] gingivostomatitis (B00.2)
  • noma (A69.0)

More specific codes for Stomatitis and related lesions

  • K12.0 - Recurrent oral aphthae
  • K12.1 - Other forms of stomatitis
  • K12.2 - Cellulitis and abscess of mouth
  • K12.3 - Oral mucositis (ulcerative)
    • K12.30 - Oral mucositis (ulcerative), unspecified
    • K12.31 - Oral mucositis (ulcerative) due to antineoplastic therapy
    • K12.32 - Oral mucositis (ulcerative) due to other drugs
    • K12.33 - Oral mucositis (ulcerative) due to radiation
    • K12.39 - Other oral mucositis (ulcerative)
See also ICD 10 code for
Back to K12
See the ICD-10-CM Coding Guidelines.

Questions related to K12 Stomatitis and related lesions

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.