Excludes1 pair
K12- vs K13.0
K12 and K13.0 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on K12
cheilitis (K13.0)
K12
Stomatitis and related lesions
Not billable
- Chapter 11
- Diseases of the digestive system
- Section
- K00-K14
K13.0
Diseases of lips
Billable
- Chapter 11
- Diseases of the digestive system
- Section
- K00-K14
Use when the record says
- Abscess of lips
- Angular cheilitis
- Cellulitis of lips
- Cheilitis NOS
- Cheilodynia
- Cheilosis
- Exfoliative cheilitis
- Fistula of lips
Indexed under
- Angulus infectiosus (lips)
- Baelz's disease (cheilitis glandularis apostematosa)
- Cheilitis (acute) (angular) (catarrhal) (chronic) (exfoliative) (gangrenous) (glandular) (infectional) (suppurative) (ulcerative) (vesicular)
- Cheilodynia
- Cheilosis (angular)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027