Excludes1 pair
D15.0 vs D35-
D15.0 and D35 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 D35
benign neoplasm of thymus (D15.0)
D15.0
Benign neoplasm of thymus
Billable
- Chapter 2
- Neoplasms
- Section
- D10-D36
Indexed under
- Thymoma › microscopic
D35
Benign neoplasm of other and unspecified endocrine glands
Not billable
- Chapter 2
- Neoplasms
- Section
- D10-D36
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