Chronic myeloproliferative disease

This code represents a group of rare, chronic hematologic malignancies characterized by the overproduction of one or more types of blood cells in the bone marrow. These disorders involve clonal proliferation of myeloid stem cells, leading to conditions such as polycythemia vera, essential thrombocythemia, and primary myelofibrosis, among others. The disease course is typically slow but can progress to acute myeloid leukemia.

Assign this code when documentation specifies a chronic myeloproliferative disease that is not otherwise classified or specified as a distinct entity with its own ICD-10-CM code. This includes diagnoses like "chronic myeloproliferative disorder, NOS" or "unspecified myeloproliferative neoplasm." Supporting documentation should clearly indicate the chronic nature and myeloproliferative origin of the condition.

• Do not use this code if a more specific chronic myeloproliferative neoplasm (e.g., polycythemia vera, essential thrombocythemia) is documented.
• Carefully review documentation to differentiate between primary myelofibrosis (coded here) and secondary myelofibrosis, which has a different code.
• Be mindful of the "Excludes1" notes to avoid co-coding with specific types of leukemia or myelofibrosis that are distinct entities.