C84Not billable, use a more specific code below
Mature T/NK-cell lymphomas
In Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96), chapter 2: Neoplasms
89 billable codes under C84: all are a CC; all map to HCC 20 (Lung and Other Severe Cancers), HCC 19 (Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers), HCC 17 (Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Excludes1: not coded here, use a different code
- personal history of non-Hodgkin lymphoma (Z85.72)
Also applies, from Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
These notes sit on C81-C96 and apply to every code under it, including C84.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding benign and malignant neoplasms: using the Neoplasm Table, sequencing primary and secondary sites, treatment encounters, complications, and current cancer versus personal history.
- Admission/Encounter for treatment of primary site (page 33)
- Admission/Encounter for treatment of secondary site (page 33)
- Coding and sequencing of complications (page 34)
- Primary malignancy previously excised (page 34)
- Admissions/Encounters involving antineoplastic chemotherapy, immunotherapy and radiation therapy (page 35)
- Admission/encounter to determine extent of malignancy (page 36)
- Symptoms, signs, and abnormal findings listed in Chapter 18 associated with neoplasms (page 36)
- Admission/encounter for pain control/management (page 36)
All codes under C84
C84 can't be used on a claim. Pick a billable code below; grey headings group them.
- C84.0Mycosis fungoides
- C84.00Mycosis fungoides, unspecified site
- C84.01Mycosis fungoides, lymph nodes of head, face, and neck
- C84.02Mycosis fungoides, intrathoracic lymph nodes
- C84.03Mycosis fungoides, intra-abdominal lymph nodes
- C84.04Mycosis fungoides, lymph nodes of axilla and upper limb
- C84.05Mycosis fungoides, lymph nodes of inguinal region and lower limb
- C84.06Mycosis fungoides, intrapelvic lymph nodes
- C84.07Mycosis fungoides, spleen
- C84.08Mycosis fungoides, lymph nodes of multiple sites
- C84.09Mycosis fungoides, extranodal and solid organ sites
- C84.0AMycosis fungoides, in remission
- C84.1Sézary disease
- C84.10Sezary disease, unspecified site
- C84.11Sezary disease, lymph nodes of head, face, and neck
- C84.12Sezary disease, intrathoracic lymph nodes
- C84.13Sezary disease, intra-abdominal lymph nodes
- C84.14Sezary disease, lymph nodes of axilla and upper limb
- C84.15Sezary disease, lymph nodes of inguinal region and lower limb
- C84.16Sezary disease, intrapelvic lymph nodes
- C84.17Sezary disease, spleen
- C84.18Sezary disease, lymph nodes of multiple sites
- C84.19Sezary disease, extranodal and solid organ sites
- C84.1ASezary disease, in remission
- C84.4Peripheral T-cell lymphoma, not elsewhere classified
- C84.40Peripheral T-cell lymphoma, not elsewhere classified, unspecified site
- C84.41Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of head, face, and neck
- C84.42Peripheral T-cell lymphoma, not elsewhere classified, intrathoracic lymph nodes
- C84.43Peripheral T-cell lymphoma, not elsewhere classified, intra-abdominal lymph nodes
- C84.44Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb
- C84.45Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb
- C84.46Peripheral T-cell lymphoma, not elsewhere classified, intrapelvic lymph nodes
- C84.47Peripheral T-cell lymphoma, not elsewhere classified, spleen
- C84.48Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of multiple sites
- C84.49Peripheral T-cell lymphoma, not elsewhere classified, extranodal and solid organ sites
- C84.4APeripheral T-cell lymphoma, not elsewhere classified, in remission
- C84.6Anaplastic large cell lymphoma, ALK-positive
- C84.60Anaplastic large cell lymphoma, ALK-positive, unspecified site
- C84.61Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck
- C84.62Anaplastic large cell lymphoma, ALK-positive, intrathoracic lymph nodes
- C84.63Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes
- C84.64Anaplastic large cell lymphoma, ALK-positive, lymph nodes of axilla and upper limb
- C84.65Anaplastic large cell lymphoma, ALK-positive, lymph nodes of inguinal region and lower limb
- C84.66Anaplastic large cell lymphoma, ALK-positive, intrapelvic lymph nodes
- C84.67Anaplastic large cell lymphoma, ALK-positive, spleen
- C84.68Anaplastic large cell lymphoma, ALK-positive, lymph nodes of multiple sites
- C84.69Anaplastic large cell lymphoma, ALK-positive, extranodal and solid organ sites
- C84.6AAnaplastic large cell lymphoma, ALK-positive, in remission
- C84.7Anaplastic large cell lymphoma, ALK-negative
- C84.70Anaplastic large cell lymphoma, ALK-negative, unspecified site
- C84.71Anaplastic large cell lymphoma, ALK-negative, lymph nodes of head, face, and neck
- C84.72Anaplastic large cell lymphoma, ALK-negative, intrathoracic lymph nodes
- C84.73Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes
- C84.74Anaplastic large cell lymphoma, ALK-negative, lymph nodes of axilla and upper limb
- C84.75Anaplastic large cell lymphoma, ALK-negative, lymph nodes of inguinal region and lower limb
- C84.76Anaplastic large cell lymphoma, ALK-negative, intrapelvic lymph nodes
- C84.77Anaplastic large cell lymphoma, ALK-negative, spleen
- C84.78Anaplastic large cell lymphoma, ALK-negative, lymph nodes of multiple sites
- C84.79Anaplastic large cell lymphoma, ALK-negative, extranodal and solid organ sites
- C84.7AAnaplastic large cell lymphoma, ALK-negative, breast
- C84.7BAnaplastic large cell lymphoma, ALK-negative, in remission
- C84.9Mature T/NK-cell lymphomas, unspecified
- C84.90Mature T/NK-cell lymphomas, unspecified, unspecified site
- C84.91Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neck
- C84.92Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodes
- C84.93Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodes
- C84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb
- C84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb
- C84.96Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodes
- C84.97Mature T/NK-cell lymphomas, unspecified, spleen
- C84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites
- C84.99Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sites
- C84.9AMature T/NK-cell lymphomas, unspecified, in remission
- C84.ACutaneous T-cell lymphoma, unspecified
- C84.A0Cutaneous T-cell lymphoma, unspecified, unspecified site
- C84.A1Cutaneous T-cell lymphoma, unspecified lymph nodes of head, face, and neck
- C84.A2Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes
- C84.A3Cutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodes
- C84.A4Cutaneous T-cell lymphoma, unspecified, lymph nodes of axilla and upper limb
- C84.A5Cutaneous T-cell lymphoma, unspecified, lymph nodes of inguinal region and lower limb
- C84.A6Cutaneous T-cell lymphoma, unspecified, intrapelvic lymph nodes
- C84.A7Cutaneous T-cell lymphoma, unspecified, spleen
- C84.A8Cutaneous T-cell lymphoma, unspecified, lymph nodes of multiple sites
- C84.A9Cutaneous T-cell lymphoma, unspecified, extranodal and solid organ sites
- C84.AACutaneous T-cell lymphoma, unspecified, in remission
- C84.ZOther mature T/NK-cell lymphomas
- C84.Z0Other mature T/NK-cell lymphomas, unspecified site
- C84.Z1Other mature T/NK-cell lymphomas, lymph nodes of head, face, and neck
- C84.Z2Other mature T/NK-cell lymphomas, intrathoracic lymph nodes
- C84.Z3Other mature T/NK-cell lymphomas, intra-abdominal lymph nodes
- C84.Z4Other mature T/NK-cell lymphomas, lymph nodes of axilla and upper limb
- C84.Z5Other mature T/NK-cell lymphomas, lymph nodes of inguinal region and lower limb
- C84.Z6Other mature T/NK-cell lymphomas, intrapelvic lymph nodes
- C84.Z7Other mature T/NK-cell lymphomas, spleen
- C84.Z8Other mature T/NK-cell lymphomas, lymph nodes of multiple sites
- C84.Z9Other mature T/NK-cell lymphomas, extranodal and solid organ sites
- C84.ZAOther mature T/NK-cell lymphomas, in remission
C84 MS-DRGs
As the principal diagnosis, the billable codes under C84 group to these 12 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 820 Lymphoma and Leukemia with Major O.R. Procedures with MCC (84 of 89 codes)
- DRG 821 Lymphoma and Leukemia with Major O.R. Procedures with CC (84 of 89 codes)
- DRG 822 Lymphoma and Leukemia with Major O.R. Procedures without CC/MCC (84 of 89 codes)
- DRG 823 Lymphoma and Non-Acute Leukemia with Other Procedures with MCC (84 of 89 codes)
- DRG 824 Lymphoma and Non-Acute Leukemia with Other Procedures with CC (84 of 89 codes)
- DRG 825 Lymphoma and Non-Acute Leukemia with Other Procedures without CC/MCC (84 of 89 codes)
- DRG 840 Lymphoma and Non-Acute Leukemia with MCC (84 of 89 codes)
- DRG 841 Lymphoma and Non-Acute Leukemia with CC (84 of 89 codes)
- DRG 842 Lymphoma and Non-Acute Leukemia without CC/MCC (84 of 89 codes)
- DRG 974 HIV with Major Related Condition with MCC (64 of 89 codes)
- DRG 975 HIV with Major Related Condition with CC (64 of 89 codes)
- DRG 976 HIV with Major Related Condition without CC/MCC (64 of 89 codes)
Other codes that refer to C84
Notes on these codes point to C84.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Lymphoma
Lymphoma is a cancer of a part of the immune system called the lymph system. There are many types of lymphoma. One type is Hodgkin disease. The rest are called non-Hodgkin lymphomas.
Read more about lymphoma on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.