Chapter 2

C00–D49: Neoplasms

Neoplasms diagnostic classification updated for 2026.

All Codes Billable Only

Internal Codes

Page 26 of 44

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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
C84.9A|
Mature T/NK-cell lymphomas, unspecified, in remission
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
C85|
Other specified and unspecified types of non-Hodgkin lymphoma
C85.1|
Unspecified B-cell lymphoma
C85.10|
Unspecified B-cell lymphoma, unspecified site
C85.11|
Unspecified B-cell lymphoma, lymph nodes of head, face, and neck
C85.12|
Unspecified B-cell lymphoma, intrathoracic lymph nodes
C85.13|
Unspecified B-cell lymphoma, intra-abdominal lymph nodes
C85.14|
Unspecified B-cell lymphoma, lymph nodes of axilla and upper limb
C85.15|
Unspecified B-cell lymphoma, lymph nodes of inguinal region and lower limb
C85.16|
Unspecified B-cell lymphoma, intrapelvic lymph nodes
C85.17|
Unspecified B-cell lymphoma, spleen
C85.18|
Unspecified B-cell lymphoma, lymph nodes of multiple sites
C85.19|
Unspecified B-cell lymphoma, extranodal and solid organ sites
C85.1A|
Unspecified B-cell lymphoma, in remission
C85.2|
Mediastinal (thymic) large B-cell lymphoma
C85.20|
Mediastinal (thymic) large B-cell lymphoma, unspecified site

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