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C84.02

Billable

Mycosis fungoides, intrathoracic lymph nodes

HCC Category Mapping

V28HCC 20Lung and Other Severe Cancers
0.000
V24HCC 10Lymphoma and Other Cancers
0.675
ESRDHCC 10Lymphoma and Other Cancers
0.000
RxHCCHCC 19Lymphoma and Other Cancers
0.000

What This Code Means

A rare type of skin cancer (mycosis fungoides) that has spread to the lymph nodes inside the chest.

Coding Tips

  • Confirm intrathoracic lymph node involvement through CT chest imaging
  • The '2' designator indicates mediastinal and hilar lymph node involvement

Clinical Significance

Mycosis fungoides with intrathoracic lymph node involvement indicates advanced disease with spread to mediastinal or hilar lymph nodes. This is uncommon in mycosis fungoides and represents significant disease progression requiring systemic treatment. Intrathoracic involvement is typically detected on staging CT or PET/CT scans.

Documentation Requirements

  • Skin biopsy confirming mycosis fungoides diagnosis
  • Chest imaging (CT or PET/CT) documenting intrathoracic lymphadenopathy
  • Pathologic confirmation of lymphomatous involvement if biopsy performed
  • TNMB staging reflecting intrathoracic nodal disease
  • Systemic treatment plan

Commonly Confused Codes

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