Diffuse Large B Cell Lymphoma with Metastasis

The patient was recently diagnosed with aggressive, diffuse large B-cell lymphoma in multiple lymphatic sites involving lymph nodes of the right hilum, right iliac and right paracolic gutter areas as well metastasis to the lung, brain and left adrenal gland. How should we report metastatic sites in a patient with lymphoma? Does the 5th character “9,” “Extranodal and other solid organ sites” capture metastatic sites outside of the lymphatic system or should each non-hematopoietic metastatic site be reported separately with codes from categories C78, Secondary malignant neoplasm of respiratory and digestive organs, and/or C79, Secondary malignant neoplasm of other and unspecified sites? What are the appropriate codes for diffuse large B-cell lymphoma involving lymph nodes of multiple sites with metastases to the lung, brain and left adrenal gland? ...

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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 premium article discusses coding considerations for diffuse large B-cell lymphoma when documentation includes both lymphatic involvement and spread to other anatomic sites. It is aimed at medical coders and billing professionals who need to understand how lymphoma-related diagnosis coding is handled in the presence of metastatic disease and how related ICD-10-CM categories are considered in that context.

Why This Topic Matters

Accurate diagnosis coding for lymphoma with additional metastatic involvement affects claim integrity, data reporting, and consistency in oncology coding workflows.

What You Will Learn

  • How the article frames metastatic site reporting in the setting of lymphoma
  • Which diagnosis code categories are discussed for lymphoma and secondary malignant neoplasm
  • How the topic is presented from a medical coding perspective for oncology cases with multiple involved sites
  • What broad ICD-10-CM considerations are raised for diffuse large B-cell lymphoma cases

Who Should Read This

  • Medical coders
  • Coding auditors
  • Billing specialists
  • Oncology revenue cycle staff
  • Clinical documentation integrity professionals

Code Ranges Discussed

  • ICD-10-CM: C78
  • ICD-10-CM: C79

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