D47.0Mast cell neoplasms of uncertain behavior

D47.0 is the ICD-10-CM diagnosis code for mast cell neoplasms of uncertain behavior. It belongs to category D47 (other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue), 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 3 subcodes must be used instead.

Within D47 (other neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue), D47.0 is specifically for mast cell neoplasms of uncertain behavior. Related codes cover chronic myeloproliferative disease (D47.1), monoclonal gammopathy (D47.2), essential (hemorrhagic) thrombocythemia (D47.3), Osteomyelofibrosis (D47.4), neoplasm of uncertain behavior of lymphoid, hematopoietic and related tissue, unspecified (D47.9) and other specified neoplasms of uncertain behavior of lymphoid, hematopoietic and related tissue (D47.Z).

To report this condition, pick the subcode that matches the documentation: D47.01 (mastocytosis), D47.02 (mastocytosis) and D47.09 (behavior).

Don't report D47.0 together with the conditions in its Excludes1 note: congenital cutaneous mastocytosis (Q82.2), histiocytic neoplasms of uncertain behavior (D47.Z9) and malignant mast cell neoplasm (C96.2-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2018 (title revised).