Valid for Submission
C91.40 is a billable diagnosis code used to specify a medical diagnosis of hairy cell leukemia not having achieved remission. The code C91.40 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code C91.40 might also be used to specify conditions or terms like atypical hairy cell leukemia, hairy cell leukemia , hairy cell leukemia of spleen, hairy cell leukemia variant, leukemic infiltration of skin in hairy-cell leukemia , leukemic reticuloendotheliosis of extranodal and/or solid organ site, etc.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code C91.40:
Inclusion TermsInclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Hairy cell leukemia with failed remission
- Hairy cell leukemia NOS
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Atypical hairy cell leukemia
- Hairy cell leukemia
- Hairy cell leukemia of spleen
- Hairy cell leukemia variant
- Leukemic infiltration of skin in hairy-cell leukemia
- 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 and upper limb
- Leukemic reticuloendotheliosis of lymph nodes of head, face and neck
- Leukemic reticuloendotheliosis of lymph nodes of inguinal region and lower limb
- Leukemic reticuloendotheliosis of lymph nodes of multiple sites
- Secondary malignant neoplasm of lymph nodes of multiple sites
Convert C91.40 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code C91.40 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Leukemia is cancer of the white blood cells. White blood cells help your body fight infection. Your blood cells form in your bone marrow. In leukemia, the bone marrow produces abnormal white blood cells. These cells crowd out the healthy blood cells, making it hard for blood to do its work.
There are different types of leukemia, including
- Acute lymphocytic leukemia
- Acute myeloid leukemia
- Chronic lymphocytic leukemia
- Chronic myeloid leukemia
Leukemia can develop quickly or slowly. Chronic leukemia grows slowly. In acute leukemia, the cells are very abnormal and their number increases rapidly. Adults can get either type; children with leukemia most often have an acute type.Some leukemias can often be cured. Other types are hard to cure, but you can often control them. Treatments may include chemotherapy, radiation and stem cell transplantation. Even if symptoms disappear, you might need therapy to prevent a relapse.
NIH: National Cancer Institute
- B-cell leukemia/lymphoma panel (Medical Encyclopedia)
- Bone marrow transplant (Medical Encyclopedia)
- Hairy cell leukemia (Medical Encyclopedia)
- Leukemia (Medical Encyclopedia)
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