Non-Billable / Non-Specific Code
ICD-10-CM C84 is the diagnosis code for Mature T/NK-cell lymphomas. This code falls under the section "Malignant neoplasms of lymphoid, hematopoietic and related tissue" within Chapter 2 — Neoplasms (C00-D49). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as C84. They are mutually exclusive:
Understanding where C84 sits in the ICD-10-CM classification helps ensure proper coding:
No, C84 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
C84 is the ICD-10-CM diagnosis code for "Mature T/NK-cell lymphomas". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C84 is located in Section C81-C96 — "Malignant neoplasms of lymphoid, hematopoietic and related tissue" within Chapter 2 of the ICD-10-CM Tabular List.
C84 has 8 sub-code(s) that provide more specific detail: C84.0, C84.1, C84.4, C84.6, C84.7 and more.
Use C84 when the patients documented diagnosis matches "Mature T/NK-cell lymphomas" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Mature T/NK-cell lymphomas is C84.
No, C84 is non-billable. Use a more specific sub-code for primary diagnosis billing.
C84 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C84 include: personal history of non-Hodgkin lymphoma (Z85.72).
Yes, C84 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.