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C84 Mature T/NK-cell lymphomas

ICD-10-CM category C84 sits in Chapter 2 (Neoplasms, C00-D49). It contains 89 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

C84.0 Mycosis fungoidesC84.1 Sezary diseaseC84.4 Peripheral T-cell lymphoma, not elsewhere classifiedC84.6 Anaplastic large cell lymphoma, ALK-positiveC84.7 Anaplastic large cell lymphoma, ALK-negativeC84.9 Mature T/NK-cell lymphomas, unspecifiedC84.A Cutaneous T-cell lymphoma, unspecifiedC84.Z Other mature T/NK-cell lymphomas

Billable codes in C84

CodeDescription
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
C84.10Sezary 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
C84.40Peripheral 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
C84.60Anaplastic 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
C84.70Anaplastic 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
C84.90Mature 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.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.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

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