Excludes1 pair
E06.1 vs E06.3
E06.1 and E06.3 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 E06.1
autoimmune thyroiditis (E06.3)
E06.1
Subacute thyroiditis
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E00-E07
Use when the record says
- de Quervain thyroiditis
- Giant-cell thyroiditis
- Granulomatous thyroiditis
- Nonsuppurative thyroiditis
- Viral thyroiditis
Indexed under
- De Quervain's › thyroiditis (subacute granulomatous thyroiditis)
- Quervain's disease › thyroid
- Thyroiditis › de Quervain's
- Thyroiditis › giant-cell (follicular)
- Thyroiditis › granulomatous (de Quervain) (subacute)
E06.3
Autoimmune thyroiditis
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E00-E07
Use when the record says
- Hashimoto's thyroiditis
- Hashitoxicosis (transient)
- Lymphadenoid goiter
- Lymphocytic thyroiditis
- Struma lymphomatosa
Indexed under
- Hashimoto's disease or thyroiditis
- Hashitoxicosis (transient)
- Lymphadenoid goiter
- Autoimmune › thyroiditis
- Disease, diseased › Hashimoto's (struma lymphomatosa)
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