C91.40
Hairy cell leukemia not having achieved remission
Clinical Classification Guidelines
Inclusion Terms
- Hairy cell leukemia with failed remission
- Hairy cell leukemia NOS
Medical Intelligence & Overview
Hairy cell leukemia (HCL) is a rare type of blood cancer that primarily affects the B-lymphocytes, a kind of white blood cell. This chronic illness can develop slowly, and treatment aims to control symptoms and reduce the number of cancerous cells. When HCL does not respond to initial treatments or tumors persist after therapy, it is considered not to have achieved remission. The ICD-10 code C91.40 specifically refers to cases of hairy cell leukemia where remission has not been attained, indicating ongoing disease activity.
Causes & Symptoms
Clinical Causes: Genetic mutations that lead to abnormal B-cell growth Exposure to certain environmental toxins or chemicals History of prior chemotherapy or radiation therapy Unknown factors, with research ongoing into other potential causes
Key Symptoms: Persistent fatigue or weakness Repeated infections or fever Easy bruising or bleeding Enlargement of the spleen or liver Unintentional weight loss Night sweats Swollen lymph nodes Anemia symptoms like pale skin and shortness of breath
Diagnostic & Treatment
Diagnosis Path: Diagnosis of hairy cell leukemia not having achieved remission involves multiple steps. Blood tests typically reveal abnormal lymphocytes with hairy projections. Bone marrow biopsies are often performed to assess marrow infiltration by malignant cells. Imaging studies such as ultrasound or CT scans may be used to evaluate organ enlargement. Specific blood markers and immunophenotyping help confirm the diagnosis and its persistence after initial therapy, indicating remission status. Since C91.40 denotes ongoing disease activity, diagnosis also involves assessing treatment history and response.
Treatment Protocols: Cladribine or pentostatin, chemotherapy agents designed to suppress cancerous B-cells Immunotherapy approaches to boost the body's immune response Splenectomy, which is surgical removal of the spleen if it is significantly enlarged or causing symptoms Clinical trials investigating new treatments or combination therapies Management of symptoms and complications, such as infections or bleeding
Clinical Advice & FAQs
Billing Guidance
Is C91.40 a billable ICD-10 code?
Yes, C91.40 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report C91.40?
Clinical documentation must specify the nature of Hairy cell leukemia not having achieved remission and any associated comorbidities for accurate reporting.
Cite this Clinical Reference