C84: Mature T/NK-cell lymphomas

Codes under C84 (Mature T/NK-cell lymphomas). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
C84.0	Mycosis fungoides	—
C84.00	Mycosis fungoides, unspecified site	✓
C84.0A	Mycosis fungoides, in remission	✓
C84.01	Mycosis fungoides, lymph nodes of head, face, and neck	✓
C84.1	Sezary disease	—
C84.1A	Sezary disease, in remission	✓
C84.02	Mycosis fungoides, intrathoracic lymph nodes	✓
C84.03	Mycosis fungoides, intra-abdominal lymph nodes	✓
C84.04	Mycosis fungoides, lymph nodes of axilla and upper limb	✓
C84.4	Peripheral T-cell lymphoma, not elsewhere classified	—
C84.4A	Peripheral T-cell lymphoma, not elsewhere classified, in remission	✓
C84.05	Mycosis fungoides, lymph nodes of inguinal region and lower limb	✓
C84.06	Mycosis fungoides, intrapelvic lymph nodes	✓
C84.6	Anaplastic large cell lymphoma, ALK-positive	—
C84.6A	Anaplastic large cell lymphoma, ALK-positive, in remission	✓
C84.07	Mycosis fungoides, spleen	✓
C84.7	Anaplastic large cell lymphoma, ALK-negative	—
C84.7A	Anaplastic large cell lymphoma, ALK-negative, breast	✓
C84.7B	Anaplastic large cell lymphoma, ALK-negative, in remission	✓
C84.08	Mycosis fungoides, lymph nodes of multiple sites	✓
C84.09	Mycosis fungoides, extranodal and solid organ sites	✓
C84.9	Mature T/NK-cell lymphomas, unspecified	—
C84.9A	Mature T/NK-cell lymphomas, unspecified, in remission	✓
C84.10	Sezary disease, unspecified site	✓
C84.11	Sezary disease, lymph nodes of head, face, and neck	✓
C84.12	Sezary disease, intrathoracic lymph nodes	✓
C84.13	Sezary disease, intra-abdominal lymph nodes	✓
C84.14	Sezary disease, lymph nodes of axilla and upper limb	✓
C84.15	Sezary disease, lymph nodes of inguinal region and lower limb	✓
C84.16	Sezary disease, intrapelvic lymph nodes	✓
C84.17	Sezary disease, spleen	✓
C84.18	Sezary disease, lymph nodes of multiple sites	✓
C84.19	Sezary disease, extranodal and solid organ sites	✓
C84.40	Peripheral T-cell lymphoma, not elsewhere classified, unspecified site	✓
C84.41	Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of head, face, and neck	✓
C84.42	Peripheral T-cell lymphoma, not elsewhere classified, intrathoracic lymph nodes	✓
C84.43	Peripheral T-cell lymphoma, not elsewhere classified, intra-abdominal lymph nodes	✓
C84.44	Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of axilla and upper limb	✓
C84.45	Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of inguinal region and lower limb	✓
C84.46	Peripheral T-cell lymphoma, not elsewhere classified, intrapelvic lymph nodes	✓
C84.47	Peripheral T-cell lymphoma, not elsewhere classified, spleen	✓
C84.48	Peripheral T-cell lymphoma, not elsewhere classified, lymph nodes of multiple sites	✓
C84.49	Peripheral T-cell lymphoma, not elsewhere classified, extranodal and solid organ sites	✓
C84.60	Anaplastic large cell lymphoma, ALK-positive, unspecified site	✓
C84.61	Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck	✓
C84.62	Anaplastic large cell lymphoma, ALK-positive, intrathoracic lymph nodes	✓
C84.63	Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes	✓
C84.64	Anaplastic large cell lymphoma, ALK-positive, lymph nodes of axilla and upper limb	✓
C84.65	Anaplastic large cell lymphoma, ALK-positive, lymph nodes of inguinal region and lower limb	✓
C84.66	Anaplastic large cell lymphoma, ALK-positive, intrapelvic lymph nodes	✓
C84.67	Anaplastic large cell lymphoma, ALK-positive, spleen	✓
C84.68	Anaplastic large cell lymphoma, ALK-positive, lymph nodes of multiple sites	✓
C84.69	Anaplastic large cell lymphoma, ALK-positive, extranodal and solid organ sites	✓
C84.70	Anaplastic large cell lymphoma, ALK-negative, unspecified site	✓
C84.71	Anaplastic large cell lymphoma, ALK-negative, lymph nodes of head, face, and neck	✓
C84.72	Anaplastic large cell lymphoma, ALK-negative, intrathoracic lymph nodes	✓
C84.73	Anaplastic large cell lymphoma, ALK-negative, intra-abdominal lymph nodes	✓
C84.74	Anaplastic large cell lymphoma, ALK-negative, lymph nodes of axilla and upper limb	✓
C84.75	Anaplastic large cell lymphoma, ALK-negative, lymph nodes of inguinal region and lower limb	✓
C84.76	Anaplastic large cell lymphoma, ALK-negative, intrapelvic lymph nodes	✓
C84.77	Anaplastic large cell lymphoma, ALK-negative, spleen	✓
C84.78	Anaplastic large cell lymphoma, ALK-negative, lymph nodes of multiple sites	✓
C84.79	Anaplastic large cell lymphoma, ALK-negative, extranodal and solid organ sites	✓
C84.90	Mature T/NK-cell lymphomas, unspecified, unspecified site	✓
C84.91	Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neck	✓
C84.92	Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodes	✓
C84.93	Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodes	✓
C84.94	Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb	✓
C84.95	Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb	✓
C84.96	Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodes	✓
C84.97	Mature T/NK-cell lymphomas, unspecified, spleen	✓
C84.98	Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites	✓
C84.99	Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sites	✓
C84.A	Cutaneous T-cell lymphoma, unspecified	—
C84.A0	Cutaneous T-cell lymphoma, unspecified, unspecified site	✓
C84.A1	Cutaneous T-cell lymphoma, unspecified lymph nodes of head, face, and neck	✓
C84.A2	Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes	✓
C84.A3	Cutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodes	✓
C84.A4	Cutaneous T-cell lymphoma, unspecified, lymph nodes of axilla and upper limb	✓
C84.A5	Cutaneous T-cell lymphoma, unspecified, lymph nodes of inguinal region and lower limb	✓
C84.A6	Cutaneous T-cell lymphoma, unspecified, intrapelvic lymph nodes	✓
C84.A7	Cutaneous T-cell lymphoma, unspecified, spleen	✓
C84.A8	Cutaneous T-cell lymphoma, unspecified, lymph nodes of multiple sites	✓
C84.A9	Cutaneous T-cell lymphoma, unspecified, extranodal and solid organ sites	✓
C84.AA	Cutaneous T-cell lymphoma, unspecified, in remission	✓
C84.Z	Other mature T/NK-cell lymphomas	—
C84.Z0	Other mature T/NK-cell lymphomas, unspecified site	✓
C84.Z1	Other mature T/NK-cell lymphomas, lymph nodes of head, face, and neck	✓
C84.Z2	Other mature T/NK-cell lymphomas, intrathoracic lymph nodes	✓
C84.Z3	Other mature T/NK-cell lymphomas, intra-abdominal lymph nodes	✓
C84.Z4	Other mature T/NK-cell lymphomas, lymph nodes of axilla and upper limb	✓
C84.Z5	Other mature T/NK-cell lymphomas, lymph nodes of inguinal region and lower limb	✓
C84.Z6	Other mature T/NK-cell lymphomas, intrapelvic lymph nodes	✓
C84.Z7	Other mature T/NK-cell lymphomas, spleen	✓
C84.Z8	Other mature T/NK-cell lymphomas, lymph nodes of multiple sites	✓
C84.Z9	Other mature T/NK-cell lymphomas, extranodal and solid organ sites	✓
C84.ZA	Other mature T/NK-cell lymphomas, in remission	✓

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right