E51 vs E64.8
E51 and E64.8 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 E51
sequelae of thiamine deficiency (E64.8)
E51
Thiamine deficiency
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E50-E64
E64.8
Sequelae of other nutritional deficiencies
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E50-E64
Indexed under
- Sequelae › calcium deficiency (of)
- Sequelae › niacin deficiency (of)
- Sequelae › selenium deficiency (of)
- Sequelae › thiamine deficiency (of)
- Sequelae › vitamin deficiency NEC (of)
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