K00.0 vs K08.1
K00.0 and K08.1 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on K08.1
congenital absence of teeth (K00.0)
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 (of) (organ or part) (complete or partial)
- Deficiency, deficient › tooth bud
K08.1
Complete loss of teeth
Not billable
- Chapter 11
- Diseases of the digestive system
- Section
- K00-K14
Use when the record says
- Acquired loss of teeth, complete
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