C91.1 - Chronic lymphocytic leukemia of B-cell type
- Applicable to Chronic lymphocytic leukemia of B-cell type
- The 2025 edition of ICD10-CM C91.1 became effective on October 1, 2024.
- This is the American ICD10-CM version of C91.1 - other international versions of ICD10 C91.1 may differ.
- C91.1 is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- C91.1 Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.
- C91.1 - Chronic lymphocytic leukemia of B-cell type
- C91.1 - Chronic lymphocytic leukemia of B-cell type
- C91.10 - Chronic lymphocytic leukemia of B-cell type not having achieved remission
- C91.11 - Chronic lymphocytic leukemia of B-cell type in remission
- C91.12 - Chronic lymphocytic leukemia of B-cell type in relapse
Inclusion Term
- Lymphoplasmacytic leukemia
- Richter syndrome
Type 1 Excludes
- lymphoplasmacytic lymphoma (C83.0-)
The following codes above C91.1 contain annotation back-references that may be applicable to C91.1:
Chapter: C00-D49 Neoplasms
Section: C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
Category: C91 Lymphoid leukemia
Non-Billable/Non-Specific Code
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Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
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