Excludes1 pair
D49.6 vs D49.7
D49.6 and D49.7 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 D49.6
neoplasm of unspecified behavior of cerebral meninges (D49.7)
D49.6
Neoplasm of unspecified behavior of brain
BillableUnspecified
- Chapter 2
- Neoplasms
- Section
- D49
Indexed under
- Degeneration, degenerative › brain › in › neoplastic disease
D49.7
Neoplasm of unspecified behavior of endocrine glands and other parts of nervous system
BillableUnspecified
- Chapter 2
- Neoplasms
- Section
- D49
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