C84.A9 – Cutaneous T-cell lymphoma, unspecified, extranodal and solid organ sites
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lymphoid, hematopoietic and related tissue
ICD-10-CM code
C84.A9
- Code
C84.A9(claims format:C84A9)- Description
- Cutaneous T-cell lymphoma, unspecified, extranodal and solid organ sites
- Short description
- Cutan T-cell lymphoma, unsp, extrnod and solid organ sites
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
- Parent codes
- C84 › C84.A
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C84 – Mature T/NK-cell lymphomas
Excludes1 (not coded here):
- personal history of non-Hodgkin lymphoma (Z85.72)
Block C81-C96
Related codes in C84.A
- C84.A0 – Cutaneous T-cell lymphoma, unspecified, unspecified siteBillable
- C84.A1 – Cutaneous T-cell lymphoma, unspecified lymph nodes of head, face, and neckBillable
- C84.A2 – Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodesBillable
- C84.A3 – Cutaneous T-cell lymphoma, unspecified, intra-abdominal lymph nodesBillable
- C84.A4 – Cutaneous T-cell lymphoma, unspecified, lymph nodes of axilla and upper limbBillable
- C84.A5 – Cutaneous T-cell lymphoma, unspecified, lymph nodes of inguinal region and lower limbBillable
- C84.A6 – Cutaneous T-cell lymphoma, unspecified, intrapelvic lymph nodesBillable
- C84.A7 – Cutaneous T-cell lymphoma, unspecified, spleenBillable
- C84.A8 – Cutaneous T-cell lymphoma, unspecified, lymph nodes of multiple sitesBillable
- C84.AA – Cutaneous T-cell lymphoma, unspecified, in remissionBillable
Frequently asked questions
What is ICD-10 code C84.A9?
C84.A9 is the ICD-10-CM code for cutaneous T-cell lymphoma, unspecified, extranodal and solid organ sites, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).
Is C84.A9 a billable code?
Yes. C84.A9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C84.A9 belong to?
It belongs to category C84 – Mature T/NK-cell lymphomas.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.