Recurrent oral aphthae
Billable / specific
K12.0 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Applicable to
- Aphthous stomatitis (major) (minor)
- Bednar's aphthae
- Periadenitis mucosa necrotica recurrens
- Recurrent aphthous ulcer
- Stomatitis herpetiformis
Excludes1
Not coded here — never report together with this code.
Excludes2
Not included here — may be reported together when both conditions exist.
- certain conditions originating in the perinatal period (P04-P96) (from K12)
- certain infectious and parasitic diseases (A00-B99) (from K12)
- complications of pregnancy, childbirth and the puerperium (O00-O9A) (from K12)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) (from K12)
- endocrine, nutritional and metabolic diseases (E00-E88) (from K12)
- injury, poisoning and certain other consequences of external causes (S00-T88) (from K12)
- neoplasms (C00-D49) (from K12)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from K12)
Use additional code
Add a code to identify the following, if applicable.
- code to identify: (from K12)
- alcohol abuse and dependence (F10.-) (from K12)
- exposure to environmental tobacco smoke (Z77.22) (from K12)
- exposure to tobacco smoke in the perinatal period (P96.81) (from K12)
- history of tobacco dependence (Z87.891) (from K12)
- occupational exposure to environmental tobacco smoke (Z57.31) (from K12)
- tobacco dependence (F17.-) (from K12)
- tobacco use (Z72.0) (from K12)
Also known as
- Aphthous stomatitis (major) (minor)
- Bednar's aphthae
- Periadenitis mucosa necrotica recurrens
- Recurrent aphthous ulcer
- Stomatitis herpetiformis
- Aphthae, aphthous, Bednar's
- Aphthae, aphthous, oral
- Aphthae, aphthous, stomatitis
- Aphthae, aphthous, ulcer
- Bednar's, aphthae
- Canker
- Sore, mouth, canker
- Stomatitis, aphthous
- Stomatitis, herpetiformis
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative, aphthous
Parent code
- K12Stomatitis and related lesionsHeader