Hairy cell leukemia not having achieved remission
- C91.40 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2025 edition of ICD-10-CM C91.40 became effective on October 1, 2024.
- This is the American ICD-10-CM version of C91.40 – other international versions of ICD-10 C91.40 may differ.
Applicable To
- Hairy cell leukemia with failed remission
- Hairy cell leukemia NOS
The following code(s) above C91.40 contain annotation back-references
that may be applicable to C91.40:
- C00-D49 Neoplasms
- C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
- C91 Lymphoid leukemia
- C91.4 Hairy cell leukemia
Approximate Synonyms
- Hairy cell leukemia (clinical)
- Hairy cell leukemia, arm ln
- Hairy cell leukemia, axillary ln
- Hairy cell leukemia, head ln
- Hairy cell leukemia, inguinal ln
- Hairy cell leukemia, leg ln
- Hairy cell leukemia, neck ln
- Leukemia, hairy cell
- Leukemic reticuloendotheliosis
- Leukemic reticuloendotheliosis extranod or solitar
- Leukemic reticuloendotheliosis intrapelvic lymph n
- Leukemic reticuloendotheliosis of extranodal and/or solid organ site
- Leukemic reticuloendotheliosis of intra-abdominal lymph nodes
- Leukemic reticuloendotheliosis of intrapelvic lymph nodes
- Leukemic reticuloendotheliosis of intrathoracic lymph nodes
- Leukemic reticuloendotheliosis of lymph nodes of axilla
- Leukemic reticuloendotheliosis of lymph nodes of head
- Leukemic reticuloendotheliosis of lymph nodes of inguinal region
- Leukemic reticuloendotheliosis of lymph nodes of lower limb
- Leukemic reticuloendotheliosis of lymph nodes of multiple sites
- Leukemic reticuloendotheliosis of lymph nodes of neck
- Leukemic reticuloendotheliosis of lymph nodes of upper limb
- Leukemic reticuloendotheliosis of spleen
- Leukemic reticuloendotheliosis spleen
Clinical Information
- A neoplastic disease of the lymphoreticular cells which is considered to be a rare type of chronic leukemia; it is characterized by an insidious onset, splenomegaly, anemia, granulocytopenia, thrombocytopenia, little or no lymphadenopathy, and the presence of “hairy” or “flagellated” cells in the blood and bone marrow.
- A rare neoplasm of small b-lymphocytes with “hairy” projections in bone marrow, spleen, and peripheral blood. Most patients are middle-aged to elderly adults and present with splenomegaly and pancytopenia. (who, 2001)
- A rare type of leukemia in which abnormal b-lymphocytes (a type of white blood cell) are present in the bone marrow, spleen, and peripheral blood. When viewed under a microscope, these cells appear to be covered with tiny hair-like projections.
- Neoplastic disease of the lymphoreticular cells which is considered to be a rare type of chronic leukemia; it is characterized by an insidious onset, splenomegaly, anemia, granulocytopenia, thrombocytopenia, little or no lymphadenopathy, and the presence of hairy or flagellated cells in the blood and bone marrow.
ICD-10-CM C91.40 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):
- 011 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with mcc
- 012 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with cc
- 013 Tracheostomy for face, mouth and neck diagnoses or laryngectomy without cc/mcc
- 820 Lymphoma and leukemia with major o.r. Procedures with mcc
- 821 Lymphoma and leukemia with major o.r. Procedures with cc
- 822 Lymphoma and leukemia with major o.r. Procedures without cc/mcc
- 823 Lymphoma and non-acute leukemia with other procedures with mcc
- 824 Lymphoma and non-acute leukemia with other procedures with cc
- 825 Lymphoma and non-acute leukemia with other procedures without cc/mcc
- 840 Lymphoma and non-acute leukemia with mcc
- 841 Lymphoma and non-acute leukemia with cc
- 842 Lymphoma and non-acute leukemia without cc/mcc
Convert C91.40 to ICD-9-CMCode History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
- 2025 (effective 10/1/2024): No change