ICD10BillableValid for clinical use

ICD-10 Code C84.A2: Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes

C84.A2 is a billable ICD-10 diagnosis code used to classify Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. 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).

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 cutaneous t-cell lymphoma, unspecified, intrathoracic lymph nodes 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.ACutaneous T-cell lymphoma, unspecified
currentC84.A

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

Sibling codes

Coding guidelines

Common synonyms

Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodesCutaneous T-cell lymphoma, unspecified

Frequently asked questions

Code details

CodeC84.A2
SystemICD10
Display nameCutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes
ChapterNeoplasms (C00-D49)
BlockMalignant neoplasms of lymphoid, hematopoietic and related tissue

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

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.

ICD-10 Code C84.A2 for Cutaneous T-cell lymphoma, unspecified, intrathoracic lymph nodes | HealthAssure