C84.1

Non-billable

Sezary disease

C84.1 is the ICD-10-CM code for Sezary disease. It is a non-billable category code — use a more specific child code such as C84.10 for billing.

Status
Header (non-billable)
Chapter
C00-D49
Parent
C84
Subcodes
11
Edition
FY2026

C00-D49 Neoplasms

What this means — in plain language

MedlinePlus · NIH

Lymphoma is a cancer of a part of the immune system called the lymph system. There are many types of lymphoma. One type is Hodgkin disease . The rest are called non-Hodgkin lymphomas. Non-Hodgkin lymphomas begin when a type of white blood cell, called a T cell or B cell, becomes abnormal. The cell divides again and again, making more and more abnormal cells. These abnormal cells can spread to almost any other part…

Read more about Lymphoma at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code C84.1?
C84.1 is the ICD-10-CM code for "Sezary disease". It falls under C00-D49 Neoplasms.
Is C84.1 a billable code?
No — C84.1 is a non-billable header code. Use a more specific child code (such as C84.10) for billing.
What are the subcodes of C84.1?
C84.1 has 11 more specific child codes, including C84.10, C84.11, C84.12.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

Look up another ICD-10 code or condition

Powered by Eleplan

Free ICD-10 lookup is just the start. Eleplan keeps the whole care plan in one place.

Diagnoses, medications, documents, appointments, and the whole care team — organized and always in sync, with Ellie, your AI care assistant, on top of it. Free to start.