ICD-10-CM › C00-D49 › C81-C96 › C84.9 Mature T/NK-cell lymphomas, unspecified › C84.9A
C84.9A
Mature T/NK-cell lymphomas, unspecified, in remission
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2025 to now.
- FY2025 Added to the code set Mature T/NK-cell lymphomas, unspecified, in remission
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from C84 Mature T/NK-cell lymphomas
Excludes1 - never coded here
- personal history of non-Hodgkin lymphoma (Z85.72)
Inherited from the C81-C96 section Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
Excludes2 - not included here
- Kaposi's sarcoma of lymph nodes (C46.3)
- secondary and unspecified neoplasm of lymph nodes (C77.-)
- secondary neoplasm of bone marrow (C79.52)
- secondary neoplasm of spleen (C78.89)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Lymphomatosis
- Lymphosarcoma
- Lymphoma > non-Hodgkin
- Non-Hodgkin lymphoma NEC
- Lymphoma > NK/T cell
- Lymphoma > mature T/NK-cell
Codes in the same group
| Code | Description | Status |
|---|---|---|
| C84.90 | Mature T/NK-cell lymphomas, unspecified, unspecified site | Valid |
| C84.91 | Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neck | Valid |
| C84.92 | Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodes | Valid |
| C84.93 | Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodes | Valid |
| C84.94 | Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb | Valid |
| C84.95 | Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb | Valid |
| C84.96 | Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodes | Valid |
| C84.97 | Mature T/NK-cell lymphomas, unspecified, spleen | Valid |
| C84.98 | Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites | Valid |
| C84.99 | Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sites | Valid |