Excludes1 pair
E70.5 vs E72.0-
E70.5 and E72.0 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 E72.0
disorders of tryptophan metabolism (E70.5)
E70.5
Disorders of tryptophan metabolism
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E70-E88
Indexed under
- Disorder › tryptophan metabolism
- Disturbance › metabolism › tryptophan
- Disorder › metabolism NOS › amino-acid › aromatic › tryptophan
E72.0
Disorders of amino-acid transport
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E70-E88
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