2019 ICD-10-CM Diagnosis Code C82.9

Follicular lymphoma, unspecified

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • C82.9 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM C82.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of C82.9 - other international versions of ICD-10 C82.9 may differ.
The following code(s) above C82.9 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 C82.9:
  • C00-D49
    2019 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
    2019 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
  • C82
    ICD-10-CM Diagnosis Code C82

    Follicular lymphoma

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    • follicular lymphoma with or without diffuse areas
    Type 1 Excludes
    • mature T/NK-cell lymphomas (C84.-)
    • personal history of non-Hodgkin lymphoma (Z85.72)
    Follicular lymphoma
Clinical Information
  • A neoplasm of follicle centre b cells which has at least a partial follicular pattern. Follicular lymphomas comprise about 35% of adult non-hodgkin lymphomas in the United States And 22% worldwide. Most patients have widespread disease at diagnosis. Morphologically, follicular lymphomas are classified as grade 1, grade 2, and grade 3, depending on the percentage of the large lymphocytes present. The vast majority of cases (70-95%) express the bcl-2 rearrangement [t(14;18)]. Histological grade correlates with prognosis. Grades 1 and 2 follicular lymphomas are indolent and grade 3 is more aggressive (adapted from who, 2001).
  • A neoplasm of lymphoid cells which has at least a partial follicular pattern.
  • A type of b-cell non-hodgkin lymphoma (cancer of the immune system) that is usually indolent (slow-growing). The tumor cells grow as groups to form nodules. There are several subtypes of follicular lymphoma.
  • Malignant lymphoma in which the lymphomatous cells are clustered into identifiable nodules within the lymph nodes. The nodules resemble to some extent the germinal center of lymph node follicles and most likely represent neoplastic proliferation of lymph node-derived follicular center b-lymphocytes.
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

Diagnosis Index entries containing back-references to C82.9:
  • Germinoblastoma (diffuse) C85.9-
    ICD-10-CM Diagnosis Code C85.9-

    Non-Hodgkin lymphoma, unspecified

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • Lymphoma NOS
    • Malignant lymphoma NOS
    • Non-Hodgkin lymphoma NOS
    • follicular C82.9-
  • Lymphoma (of) (malignant) C85.90
    ICD-10-CM Diagnosis Code C85.90

    Non-Hodgkin lymphoma, unspecified, unspecified site

      2016 2017 2018 2019 Billable/Specific Code

ICD-10-CM Codes Adjacent To C82.9
C82.80 …… unspecified site
C82.81 …… lymph nodes of head, face, and neck
C82.82 …… intrathoracic lymph nodes
C82.83 …… intra-abdominal lymph nodes
C82.84 …… lymph nodes of axilla and upper limb
C82.85 …… lymph nodes of inguinal region and lower limb
C82.86 …… intrapelvic lymph nodes
C82.87 …… spleen
C82.88 …… lymph nodes of multiple sites
C82.89 …… extranodal and solid organ sites
C82.9 Follicular lymphoma, unspecified
C82.90 …… unspecified site
C82.91 …… lymph nodes of head, face, and neck
C82.92 …… intrathoracic lymph nodes
C82.93 …… intra-abdominal lymph nodes
C82.94 …… lymph nodes of axilla and upper limb
C82.95 …… lymph nodes of inguinal region and lower limb
C82.96 …… intrapelvic lymph nodes
C82.97 …… spleen
C82.98 …… lymph nodes of multiple sites
C82.99 …… extranodal and solid organ sites

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