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Code grade specified by pathologist. If no grade specified, code 9
Aleukemic granulocytic leukemia [OBS]
Aleukemic monocytic leukemia [OBS]
Aleukemic myelogenous leukemia [OBS]
Aleukemic myeloid leukemia [OBS]
Chronic monocytic leukemia [OBS]
Granulocytic leukemia, NOS
Myelocytic leukemia, NOS
Myelogenous leukemia, NOS [OBS] see code 9875/3
Myelomonocytic leukemia [OBS] see codes 9945/3 or 9967/3
Non-lymphocytic leukemia, NOS
Subacute granulocytic leukemia [OBS]
Subacute monocytic leukemia [OBS]
Subacute myelogenous leukemia [OBS]
Subacute myeloid leukemia [OBS]
General term for non-specific myeloid leukemia (unknown if chronic or acute) in which cell typing has not been done, or the information is not available.
Myeloid leukemia, NOS is a generic disease description. DCO cases or path report only cases may stay in this classification. In most cases, NOS histology is only the provisional diagnosis; the physician will run further diagnostic procedures and look for various clinical presentations to identify a more specific disease. Further review of the medical record should be done to look for the tests listed as definitive diagnosis. If no information is found in the medical record, follow-back to the attending physician should be done. More specific myeloid leukemias include: acute myeloid leukemia, NOS; acute myeloid leukemia (megakaryoblastic) with t(1;22)(p13;q13);RBM15-MKL1; acute myeloid leukemia with inv(16)(p13.1q22) or t(16;16)(p13.1;q22), CBFB/MYH11; acute myeloid leukemia with inv(3)(q21;q26.2) or t(3;3)(q21;q26;2); RPN1-EVI1; acute myeloid leukemia with maturation; acute myeloid leukemia with minimal differentiation; acute myeloid leukemia with mutated CEBPA; acute myeloid leukemia with mutated NPM1; acute myeloid leukemia with myelodysplasia-related changes; acute myeloid leukemia with t(6;9)(p23;q34); DEK-NUP214; acute myeloid leukemia with t(8;21)(q22;q22); RUNX1-RUNX1T1; acute myeloid leukemia with t(9;11)(p22;q23); MLLT3-MLL; acute myeloid leukemia without maturation; myeloid leukemia associated with Down syndrome and myeloid neoplasm with PDGFRB arrangement.When a more specific diagnosis is identified, the histology should be changed to the more specific neoplasm name and code. See the histology tables for more information on NOS and more specific histologies.