D38.4 vs D44
D38.4 and D44 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on D44
neoplasm of uncertain behavior of thymus (D38.4)
D44
Neoplasm of uncertain behavior of endocrine glands
Not billable
- Chapter 2
- Neoplasms
- Section
- D37-D48
Indexed under
- Adenoma › endocrine, multiple › two or more specified sites
- Adenoma › multiple endocrine › two or more specified sites
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