Small Lymphocytic Lymphoma/Chronic Lymphocytic Leukemia

A patient with small lymphocytic lymphoma (SLL)/chronic lymphocytic leukemia (CLL) in relapse presents to his primary care physician for follow-up. The provider documented, “No lymph node involvement.” Would the physician need to document CLL with SLL of “B-cell type” in order to assign a code from subcategory C91.1, Chronic lymphocytic leukemia of B-cell type, or does the classification presume “B-cell type” when SLL/CLL is documented in the health record? Additionally, there are mutually exclusive Excludes1 notes at both subcategories C83.0, Small cell B-cell lymphoma, and C91.1, Chronic lymphocytic leukemia of B-cell type. What is the correct ICD-10-CM code assignment for SLL/CLL? ...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This article explains how to interpret documentation involving small lymphocytic lymphoma/chronic lymphocytic leukemia in an ICD-10-CM coding context. It is aimed at coders and documentation specialists who need to understand how the diagnosis is represented in the record, what broad category the discussion centers on, and how related guideline or note structure affects code assignment considerations.

Why This Topic Matters

Accurate classification of hematologic malignancies depends on matching documentation to the correct ICD-10-CM category and understanding related note structure. This topic is relevant when reviewing records that mention SLL/CLL, relapse, or related lymphoma/leukemia terminology.

What You Will Learn

  • How this diagnosis is discussed in ICD-10-CM coding terms
  • What documentation questions commonly arise for SLL/CLL cases
  • How related ICD-10-CM note structure can affect code review considerations
  • Which general coding category the article focuses on

Who Should Read This

  • Medical coders
  • Coding auditors
  • Clinical documentation specialists
  • Revenue cycle professionals
  • Hematology/oncology coding staff

Codes Discussed

  • ICD-10-CM: C91.1
  • ICD-10-CM: C83.0

Code Ranges Discussed

  • ICD-10-CM: C91.1
  • ICD-10-CM: C83.0

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