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ICD-10-CM Code C84.0
Mycosis fungoides

Non-Billable Code
Non-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
| ICD-10 from 2011 - 2016

ICD Code C84.0 is a non-billable code. To code a diagnosis of this type, you must use one of the ten child codes of C84.0 that describes the diagnosis 'mycosis fungoides' in more detail.

The ICD code C840 is used to code Cutaneous T cell lymphoma

Cutaneous T cell lymphoma (CTCL) is a class of non-Hodgkin lymphoma, which is a type of cancer of the immune system. Unlike most non-Hodgkin lymphomas (which are generally B cell related), CTCL is caused by a mutation of T cells. The malignant T cells in the body initially migrate to the skin, causing various lesions to appear. These lesions change shape as the disease progresses, typically beginning as what appears to be a rash which can be very itchy and eventually forming plaques and tumors before metastasizing to other parts of the body.

Specialty: Hematology And Oncology
MeSH Codes: D016410, D016410
ICD 9 Codes: 202.1, 202.2

Micrograph showing cutaneous T-cell lymphoma. H&E stain.

Source: Wikipedia

Coding Notes for C84.0 Info for medical coders on how to properly use this ICD-10 code

Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Peripheral T-cell lymphoma, not classified - instead, use code C84.4-

Related Concepts SNOMET-CT

  • Mycosis fungoides of extranodal AND/OR solid organ site (disorder)

Coding Advice SNOMET-CT

  • Possible requirement for morphology code

ICD-10-CM Alphabetical Index References for 'C84.0 - Mycosis fungoides'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code C84.0. Click on any term below to browse the alphabetical index.

Parent Code: C84 - Mature T/NK-cell lymphomas

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/C840