C84.A
⚠ Non-billable
Cutaneous T-cell lymphoma, unspecified
ICD-10-CM · FY2026 · Neoplasms
Code
C84.A
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code C84.A?
ICD-10-CM code C84.A represents Cutaneous T-cell lymphoma, unspecified. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C84.A billable?
No. C84.A is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C84.A in?
C84.A belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C84 category
C84
Mature T/NK-cell lymphomas
Non-billable
C84.0
Mycosis fungoides
Non-billable
C84.1
Sezary disease
Non-billable
C84.4
Peripheral T-cell lymphoma, not elsewhere classified
Non-billable
C84.6
Anaplastic large cell lymphoma, ALK-positive
Non-billable
C84.7
Anaplastic large cell lymphoma, ALK-negative
Non-billable
C84.Z
Other mature T/NK-cell lymphomas
Non-billable
C84.9
Mature T/NK-cell lymphomas, unspecified
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →