D43Neoplasm of uncertain behavior of brain and central nervous system

D43 is the ICD-10-CM diagnosis code for neoplasm of uncertain behavior of brain and central nervous system. It belongs to block D37-D48 (neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: D43.0 (supratentorial), D43.1 (infratentorial), D43.2 (unspecified), D43.3 (nerves), D43.4 (cord), D43.8 (system) and D43.9 (unspecified).

Don't report D43 together with the conditions in its Excludes1 note: neoplasm of uncertain behavior of peripheral nerves and autonomic nervous system (D48.2).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.