Excludes1 pair
E27.1 vs E85-
E27.1 and E85 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 E27.1
amyloidosis (E85.-)
E27.1
Primary adrenocortical insufficiency
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
Use when the record says
- Addison's disease
- Autoimmune adrenalitis
Indexed under
- Addison's › disease or syndrome (bronze)
- Adrenalitis, adrenitis › autoimmune
- Disease, diseased › bronze Addison's
- Hypoadrenalism, hypoadrenia › primary
- Hypoadrenocorticism › primary
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