C84.9

Hierarchy

Where C84.9 sits in the official hierarchy. Each level is the code it is classified under.

1. C84 Parent Mature T/NK-cell lymphomas
2. C84.9 This code Mature T/NK-cell lymphomas, unspecified

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

• C84.90 Mature T/NK-cell lymphomas, unspecified, unspecified site Billable
• C84.91 Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neck Billable
• C84.92 Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodes Billable
• C84.93 Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodes Billable
• C84.94 Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limb Billable
• C84.95 Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limb Billable
• C84.96 Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodes Billable
• C84.97 Mature T/NK-cell lymphomas, unspecified, spleen Billable
• C84.98 Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sites Billable
• C84.99 Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sites Billable
• C84.9A Mature T/NK-cell lymphomas, unspecified, in remission Billable

Version History

How C84.9 appears in each release imported from the official files, newest first.

1. FY 2027 Effective October 1, 2026

   Current

   Mature T/NK-cell lymphomas, unspecified

2. FY 2026 Effective October 1, 2025

   Unchanged

   Mature T/NK-cell lymphomas, unspecified