2020 ICD-10-CM Diagnosis Code C84

Mature T/NK-cell lymphomas

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • C84 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM C84 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of C84 - other international versions of ICD-10 C84 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as C84. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • personal history of non-Hodgkin lymphoma (
    ICD-10-CM Diagnosis Code Z85.72

    Personal history of non-Hodgkin lymphomas

      2016 2017 2018 2019 2020 Billable/Specific Code POA Exempt
    Applicable To
    • Conditions classifiable to C82-C85
    Z85.72
    )
The following code(s) above C84 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to C84:
  • C00-D49
    2020 ICD-10-CM Range C00-D49

    Neoplasms

    Note
    • Functional activity
    • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
    • Morphology [Histology]
    • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
    • Primary malignant neoplasms overlapping site boundaries
    • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
    • Malignant neoplasm of ectopic tissue
    • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
    Neoplasms
  • C81-C96
    2020 ICD-10-CM Range C81-C96

    Malignant neoplasms of lymphoid, hematopoietic and related tissue

    Type 2 Excludes
    • Kaposi's sarcoma of lymph nodes (C46.3)
    • secondary and unspecified neoplasm of lymph nodes (C77.-)
    • secondary neoplasm of bone marrow (C79.52)
    • secondary neoplasm of spleen (C78.89)
    Malignant neoplasms of lymphoid, hematopoietic and related tissue
Clinical Information
  • A group of malignant lymphomas thought to derive from peripheral t-lymphocytes in lymph nodes and other nonlymphoid sites. They include a broad spectrum of lymphocyte morphology, but in all instances express t-cell markers admixed with epithelioid histiocytes, plasma cells, and eosinophils. Although markedly similar to large-cell immunoblastic lymphoma (lymphoma, large-cell, immunoblastic), this group's unique features warrant separate treatment.
  • Aggressive nodal or extranodal mature (peripheral) t-cell lymphomas that do not belong to the better defined entities of the remainder of mature t-cell lymphomas. This category includes the following variants: lymphoepithelioid cell variant (lennert's lymphoma), follicular variant, and t-zone variant.
  • One of a group of aggressive (fast-growing) non-hodgkin lymphomas that begin in mature t lymphocytes (t cells that have matured in the thymus gland and gone to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen.)
  • One of a group of aggressive (fast-growing) non-hodgkin lymphomas that begins in mature t lymphocytes (t cells that have matured in the thymus gland and goes to other lymphatic sites in the body, including lymph nodes, bone marrow, and spleen.)
  • This type of lymphoma is not frequently seen in the western hemisphere. Clinically, with the exception of anaplastic large cell lymphoma, mature t- and nk-cell lymphomas are among the most aggressive of all hematopoietic neoplasms. Representative disease entities include mycosis fungoides, angioimmunoblastic t-cell lymphoma, hepatosplenic t-cell lymphoma, and anaplastic large cell lymphoma.
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
Code annotations containing back-references to C84:
  • Type 1 Excludes: C82
    , C83.0
    , C83.3
    , C86
    ICD-10-CM Diagnosis Code C82

    Follicular lymphoma

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Includes
    • follicular lymphoma with or without diffuse areas
    Type 1 Excludes
    • mature T/NK-cell lymphomas (C84.-)
    • personal history of non-Hodgkin lymphoma (Z85.72)
    ICD-10-CM Diagnosis Code C83.0

    Small cell B-cell lymphoma

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Lymphoplasmacytic lymphoma
    • Nodal marginal zone lymphoma
    • Non-leukemic variant of B-CLL
    • Splenic marginal zone lymphoma
    Type 1 Excludes
    • chronic lymphocytic leukemia (C91.1)
    • mature T/NK-cell lymphomas (C84.-)
    • Waldenström macroglobulinemia (C88.0)
    ICD-10-CM Diagnosis Code C83.3

    Diffuse large B-cell lymphoma

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Anaplastic diffuse large B-cell lymphoma
    • CD30-positive diffuse large B-cell lymphoma
    • Centroblastic diffuse large B-cell lymphoma
    • Diffuse large B-cell lymphoma, subtype not specified
    • Immunoblastic diffuse large B-cell lymphoma
    • Plasmablastic diffuse large B-cell lymphoma
    • Diffuse large B-cell lymphoma, subtype not specified
    • T-cell rich diffuse large B-cell lymphoma
    Type 1 Excludes
    • mediastinal (thymic) large B-cell lymphoma (C85.2-)
    • mature T/NK-cell lymphomas (C84.-)
    ICD-10-CM Diagnosis Code C86

    Other specified types of T/NK-cell lymphoma

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • anaplastic large cell lymphoma, ALK negative (C84.7-)
    • anaplastic large cell lymphoma, ALK positive (C84.6-)
    • mature T/NK-cell lymphomas (C84.-)
    • other specified types of non-Hodgkin lymphoma (C85.8-)
ICD-10-CM Codes Adjacent To C84
C83.90 …… unspecified site
C83.91 …… lymph nodes of head, face, and neck
C83.92 …… intrathoracic lymph nodes
C83.93 …… intra-abdominal lymph nodes
C83.94 …… lymph nodes of axilla and upper limb
C83.95 …… lymph nodes of inguinal region and lower limb
C83.96 …… intrapelvic lymph nodes
C83.97 …… spleen
C83.98 …… lymph nodes of multiple sites
C83.99 …… extranodal and solid organ sites
C84 Mature T/NK-cell lymphomas
C84.0 Mycosis fungoides
C84.00 …… unspecified site
C84.01 …… lymph nodes of head, face, and neck
C84.02 …… intrathoracic lymph nodes
C84.03 …… intra-abdominal lymph nodes
C84.04 …… lymph nodes of axilla and upper limb
C84.05 …… lymph nodes of inguinal region and lower limb
C84.06 …… intrapelvic lymph nodes
C84.07 …… spleen
C84.08 …… lymph nodes of multiple sites

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.