C84.0
Non-billableMycosis fungoides
C84.0 is the ICD-10-CM code for Mycosis fungoides. It is a non-billable category code — use a more specific child code such as C84.00 for billing.
C00-D49 Neoplasms
What this means — in plain language
MedlinePlus · NIHLymphoma 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.
Excludes1 — not coded here
- •peripheral T-cell lymphoma, not elsewhere classified (C84.4-)
Frequently asked questions
- What is ICD-10 code C84.0?
- C84.0 is the ICD-10-CM code for "Mycosis fungoides". It falls under C00-D49 Neoplasms.
- Is C84.0 a billable code?
- No — C84.0 is a non-billable header code. Use a more specific child code (such as C84.00) for billing.
- What are the subcodes of C84.0?
- C84.0 has 11 more specific child codes, including C84.00, C84.01, C84.02.
- What is excluded from C84.0?
- Excludes1 (not coded here): peripheral T-cell lymphoma, not elsewhere classified (C84.4-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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