Billable / Specific Code
ICD-10-CM C91.10 is the diagnosis code for Chronic lymphocytic leukemia of B-cell type not having achieved remission. This code falls under the section "Malignant neoplasms of lymphoid, hematopoietic and related tissue" within Chapter 2 — Neoplasms (C00-D49). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where C91.10 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C91.10 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C91.10 is the ICD-10-CM diagnosis code for "Chronic lymphocytic leukemia of B-cell type not having achieved remission". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of C91.10 is C91.1 ("Chronic lymphocytic leukemia of B-cell type"). C91.10 provides a more specific classification within this category.
C91.10 is located in Section C81-C96 — "Malignant neoplasms of lymphoid, hematopoietic and related tissue" within Chapter 2 of the ICD-10-CM Tabular List.
Use C91.10 when the patients documented diagnosis matches "Chronic lymphocytic leukemia of B-cell type not having achieved remission" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Chronic lymphocytic leukemia of B-cell type not having achieved remission is C91.10.
Yes, C91.10 can be used as a primary diagnosis code since it is billable and specific.
C91.10 is in Chapter 2 of the ICD-10-CM Tabular List.
Yes, C91.10 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.