Excludes1 pair
E01- vs E02
E01 and E02 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 E01
subclinical iodine-deficiency hypothyroidism (E02)
E01
Iodine-deficiency related thyroid disorders and allied conditions
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E00-E07
E02
Subclinical iodine-deficiency hypothyroidism
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E00-E07
Indexed under
- Hypothyroidism › subclinical, iodine-deficiency related
- Hypothyroidism › iodine-deficiency › subclinical
- Hypothyroidism › due to › iodine-deficiency, acquired › subclinical
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