ICD10BillableValid for clinical use
ICD-10 Code C84.9A: Mature T/NK-cell lymphomas, unspecified, in remission
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents mature t/nk-cell lymphomas, unspecified, in remission in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
C00-C96Malignant neoplasms
block
C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue
category
C84Mature T/NK-cell lymphomas
category
C84.9Mature T/NK-cell lymphomas, unspecified
currentC84.9
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
OncologistGeneral Physician
Related codes
C84.90Mature T/NK-cell lymphomas, unspecified, unspecified sitecodeC84.91Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neckcodeC84.92Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodescodeC84.93Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodescodeC84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limbcodeC84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limbcodeC84.96Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodescodeC84.97Mature T/NK-cell lymphomas, unspecified, spleencodeC84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sitescodeC84.99Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sitescode
Sibling codes
C84.90Mature T/NK-cell lymphomas, unspecified, unspecified sitebillableC84.91Mature T/NK-cell lymphomas, unspecified, lymph nodes of head, face, and neckbillableC84.92Mature T/NK-cell lymphomas, unspecified, intrathoracic lymph nodesbillableC84.93Mature T/NK-cell lymphomas, unspecified, intra-abdominal lymph nodesbillableC84.94Mature T/NK-cell lymphomas, unspecified, lymph nodes of axilla and upper limbbillableC84.95Mature T/NK-cell lymphomas, unspecified, lymph nodes of inguinal region and lower limbbillableC84.96Mature T/NK-cell lymphomas, unspecified, intrapelvic lymph nodesbillableC84.97Mature T/NK-cell lymphomas, unspecified, spleenbillableC84.98Mature T/NK-cell lymphomas, unspecified, lymph nodes of multiple sitesbillableC84.99Mature T/NK-cell lymphomas, unspecified, extranodal and solid organ sitesbillable
Coverage-related procedures and services
CPT 81479high
UNLISTED MOLECULAR PATHOLOGY PROCEDURE
Source: CMS coverage guidance
CPT 70460high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70450high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 70470high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
CPT 74177high
COMPUTED TOMOGRAPHY, ABDOMEN AND PELVIS; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 74176high
COMPUTED TOMOGRAPHY, ABDOMEN AND PELVIS; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Mature T/NK-cell lymphomas, unspecified, in remissionMature T/NK-cell lymphomas, unspecified
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.