K12.2
Cellulitis and abscess of mouth
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 18 never code together
K12code
K12.2code
Excludes2
- abscess of salivary gland (K11.3)K11.3K11.3
- abscess of tongue (K14.0)K14.0K14.0
- periapical abscess (K04.6-K04.7)K04.6-K04.7K04.6-K04.7
- periodontal abscess (K05.21)K05.21K05.21
- peritonsillar abscess (J36)J36J36
K00-K95chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 10
K12code
Use additional code
- code to identify:
- alcohol abuse and dependence (F10.-)F10.-
- exposure to environmental tobacco smoke (Z77.22)Z77.22
- exposure to tobacco smoke in the perinatal period (P96.81)P96.81
- history of tobacco dependence (Z87.891)Z87.891
- occupational exposure to environmental tobacco smoke (Z57.31)Z57.31
- tobacco dependence (F17.-)F17.-
- tobacco use (Z72.0)Z72.0
K12.2code
Inclusion terms
- Cellulitis of mouth (floor)
- Submandibular abscess
Index entries leading here 11
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- Angina (attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor) I20.9
- Fistula (cutaneous) L98.8
- Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) L03.90
- Disease, diseased — see also Syndrome
- Ludwig's (submaxillary cellulitis) K12.2
- Furuncle L02.92
- Gangrene, gangrenous (connective tissue) (dropsical) (dry) (moist) (skin) (ulcer) I96
- uvulitis K12.2
- Ludwig's angina or disease K12.2
- Staphylitis (acute) (catarrhal) (chronic) (gangrenous) (membranous) (suppurative) (ulcerative) K12.2
- Stomatitis (denture) (ulcerative) K12.1
- suppurative (acute) K12.2
- Uvulitis (acute) (catarrhal) (chronic) (membranous) (suppurative) (ulcerative) K12.2
Alongside this code 3 same parent — K12
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.