Cellulitis and abscess of mouth. Includes: Cellulitis of mouth (floor), Submandibular abscess. Excludes2: abscess of salivary gland (K11.3), abscess of tongue (K14.0), periapical abscess (K04.6-K04.7), periodontal abscess (K05.21), peritonsillar abscess (J36)

Example 1: A patient presents with swelling and redness on the floor of their mouth, along with pain and difficulty swallowing.Diagnosis: Cellulitis of floor of mouth (K12.2)., A patient has a painful, fluctuant swelling beneath their jaw.Diagnosis: Submandibular abscess (K12.2)., A patient with a history of poor oral hygiene experiences fever, chills, and a swollen, tender area inside their mouth. Diagnosis: Cellulitis and abscess of mouth (K12.2).

Documentation should include physical exam findings (e.g., swelling, redness, tenderness, fluctuance), location of the cellulitis/abscess, and associated symptoms. If imaging studies (e.g., CT scan) are performed, the results should be documented.Any procedures performed, such as incision and drainage, should also be noted.