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    v1.0.28
    OpenPayerBilling CodesMalignant neoplasms of lymphoid, hematopoietic and related tissueICD-10-CM c82-follicular-lymphoma
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    ICD-10-CM Code For Follicular Lymphoma: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group C82 includes follicular lymphoma subtypes, which are malignant neoplasms of follicle center B lymphocytes presenting in lymph nodes or extranodal sites. These ICD-10-CM diagnosis codes are used to document disease extent, histologic grade, and sites of involvement to capture clinical complexity and guide oncology care. Accurate coding within the ICD-10-CM C82 group supports proper claim adjudication and complete clinical documentation for appropriate reimbursement.

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    ICD-10-CM C82: Follicular Lymphoma Overview

    Follicular lymphoma codes represent malignant neoplasms of follicular B-cell origin affecting the lymphatic and hematopoietic systems. These diagnoses target lymph nodes and related lymphoid tissues and may include nodal and extranodal presentations. Accurate coding matters for appropriate staging, clinical documentation, and reimbursement for oncology services.

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    When to Use

    Use a code from this group when a clinical diagnosis of follicular lymphoma has been established by histology, immunophenotyping, or other definitive diagnostic criteria. Apply codes that reflect the specific histologic grade and site of involvement to document disease extent and support care and billing.

    ICD-10-CM Codes

    99 rows

    ICD-10-CM CodeDescription
    C82.00Follicular lymphoma grade I, unspecified site
    C82.01Follicular lymphoma grade I, lymph nodes of head, face, and neck
    C82.02Follicular lymphoma grade I, intrathoracic lymph nodes
    C82.03Follicular lymphoma grade I, intra-abdominal lymph nodes
    C82.04Follicular lymphoma grade I, lymph nodes of axilla and upper limb
    C82.05Follicular lymphoma grade I, lymph nodes of inguinal region and lower limb
    C82.06Follicular lymphoma grade I, intrapelvic lymph nodes
    C82.07Follicular lymphoma grade I, spleen
    C82.08Follicular lymphoma grade I, lymph nodes of multiple sites
    C82.09Follicular lymphoma grade I, extranodal and solid organ sites
    C82.0AFollicular lymphoma grade I, in remission
    C82.10Follicular lymphoma grade II, unspecified site
    C82.11Follicular lymphoma grade II, lymph nodes of head, face, and neck
    C82.12Follicular lymphoma grade II, intrathoracic lymph nodes
    C82.13Follicular lymphoma grade II, intra-abdominal lymph nodes
    C82.14Follicular lymphoma grade II, lymph nodes of axilla and upper limb
    C82.15Follicular lymphoma grade II, lymph nodes of inguinal region and lower limb
    C82.16Follicular lymphoma grade II, intrapelvic lymph nodes
    C82.17Follicular lymphoma grade II, spleen
    C82.18Follicular lymphoma grade II, lymph nodes of multiple sites

    Showing 1–20 of 99

    DRG Codes

    15 rows

    DRG CodeDescription
    011Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC
    012Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC
    013Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC
    820Lymphoma and Leukemia with Major O.R. Procedures with MCC
    821Lymphoma and Leukemia with Major O.R. Procedures with CC
    822Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC
    823Lymphoma and Non-Acute Leukemia with Other Procedures with MCC
    824Lymphoma and Non-Acute Leukemia with Other Procedures with CC
    825Lymphoma and Non-Acute Leukemia with Other Procedures without CC/MCC
    840Lymphoma and Non-Acute Leukemia with MCC
    841Lymphoma and Non-Acute Leukemia with CC
    842Lymphoma and Non-Acute Leukemia without CC/MCC
    974HIV with Major Related Condition with MCC
    975HIV with Major Related Condition with CC
    976HIV with Major Related Condition without CC/MCC

    Typical Clinical Scenarios

    • An elderly patient with painless, progressive cervical and axillary lymphadenopathy noted over months presents to hematology for evaluation of unexplained lymph node enlargement and B symptoms (night sweats, weight loss). Excisional lymph node biopsy demonstrates follicular architecture with centrocytes and centroblasts consistent with follicular lymphoma, and staging workup shows limited nodal involvement without systemic organ infiltration; a diagnosis from this group is assigned for histologically confirmed indolent B‑cell non‑Hodgkin lymphoma. Typical codes: C82.40, C82.41
    • A middle‑aged patient with known follicular lymphoma previously managed with watchful waiting now presents with rapidly enlarging abdominal mass, new onset fever, and rising LDH; biopsy reveals transformation to a higher‑grade follicular lymphoma with increased centroblasts, and imaging shows extranodal spleen involvement. This acute clinical change prompts assignment of a code from the group reflecting higher grade or organ involvement to document progression and direct urgent oncology care. Typical codes: C82.10, C82.14
    • A patient receiving long‑term chemotherapy for follicular lymphoma develops chronic immunosuppression and recurrent infections leading to hospitalization; chart documentation links active treated follicular lymphoma as a comorbidity affecting management decisions and infection risk. A diagnosis code from this group is used on the inpatient record to capture the underlying malignant lymphoid neoplasm contributing to the clinical course. Typical codes: C82.90, C82.91

    Related Codes

    C81-HODGKIN-LYMPHOMA

    ICD-10-CM Code For Hodgkin Lymphoma: Group Overview

    C83-NON-FOLLICULAR-LYMPHOMA

    ICD-10-CM Code For Non-Follicular Lymphoma: Group Overview

    C84-MATURE-T-NK-CELL-LYMPHOMAS

    ICD-10-CM Code For Mature T/NK-Cell Lymphomas: Group Overview

    C85-OTHER-SPECIFIED-AND-UNSPECIFIED-NON-HODGKIN-LYMPHOMA

    ICD-10-CM Code For Other Specified And Unspecified Types Of Non Hodgkin Lymphoma: Group Overview

    C86-OTHER-SPECIFIED-T-NK-CELL-LYMPHOMA

    ICD-10-CM Code For Other Specified Types Of T NK Cell Lymphoma: Group Overview

    C88-MALIGNANT-IMMUNOPROLIFERATIVE-DISEASES

    ICD-10-CM Code For Malignant Immunoproliferative Diseases And Certain Other B-Cell Lymphomas: Group Overview

    C90-MULTIPLE-MYELOMA-AND-PLASMA-CELL-NEOPLASMS

    ICD-10-CM Code For Multiple Myeloma And Malignant Plasma Cell Neoplasms: Group Overview

    C91-LYMPHOID-LEUKEMIA

    ICD-10-CM Code For Lymphoid Leukemia: Group Overview

    C92-MYELOID-LEUKEMIA

    ICD-10-CM Code For Myeloid Leukemia: Group Overview

    C93-MONOCYTIC-LEUKEMIA

    ICD-10-CM Code For Monocytic Leukemia: Group Overview

    Showing 1–10 of 13

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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