Excludes1 pair
K00.0 vs K08-
K00.0 and K08 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 K00.0
acquired absence of teeth (K08.1-)
K00.0
Anodontia
Billable
- Chapter 11
- Diseases of the digestive system
- Section
- K00-K14
Use when the record says
- Hypodontia
- Oligodontia
Indexed under
- Anodontia (complete) (partial) (vera)
- Absence › teeth, tooth (congenital)
- Deficiency, deficient › tooth bud
K08
Other disorders of teeth and supporting structures
Not billable
- Chapter 11
- Diseases of the digestive system
- Section
- K00-K14
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