2018 ICD-10-CM Diagnosis Code C84

Mature T/NK-cell lymphomas

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 Billable/Specific Code POA Exempt
    Applicable To
    • Conditions classifiable to C82-C85
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
    2018 ICD-10-CM Range C00-D49


    • 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).
  • C81-C96
    2018 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 Code History
Code annotations containing back-references to C84:
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.