2025 ICD-10-CM Diagnosis Code C83.5

Lymphoblastic (diffuse) lymphoma

  • C83.5 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2025 edition of ICD-10-CM C83.5 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of C83.5 – other international versions of ICD-10 C83.5 may differ.

Applicable To

  • B-precursor lymphoma
  • Lymphoblastic B-cell lymphoma
  • Lymphoblastic lymphoma NOS
  • Lymphoblastic T-cell lymphoma
  • T-precursor lymphoma

The following code(s) above C83.5 contain annotation back-references

 that may be applicable to C83.5:

  • C00-D49  Neoplasms
  • C81-C96  Malignant neoplasms of lymphoid, hematopoietic and related tissue
  • C83  Non-follicular lymphoma

Clinical Information

  • A lymphoblastic lymphoma composed of immature small to medium-sized lymphoid cells (lymphoblasts). It includes the precursor b- and t-cell lymphoblastic lymphoma.
  • A lymphoma composed of immature small to medium-sized precursor lymphoid cells (lymphoblasts). It includes the b- and t-cell lymphoblastic lymphoma.
  • A malignant neoplasm composed of lymphoblasts (lymphoid precursor cells).
  • An aggressive (fast-growing) type of non-hodgkin lymphoma in which too many lymphoblasts (immature white blood cells) are found in the lymph nodes and the thymus gland. These lymphoblasts may spread to other places in the body. It is most common in teenagers and young adults and affects more males than females. It may be a t or b cell type.

Code History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to C83.5:

  • Lymphoma (of) (malignant) C85.90
    • B-precursor C83.5-
    • lymphoblastic B-cell C83.5-
    • lymphoblastic C83.5- (diffuse)
    • lymphoblastic T-cell C83.5-
    • T-precursor C83.5-
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