ICD-9 Diagnosis Code 164.0

Malignant neopl thymus

Diagnosis Code 164.0

ICD-9: 164.0
Short Description: Malignant neopl thymus
Long Description: Malignant neoplasm of thymus
This is the 2014 version of the ICD-9-CM diagnosis code 164.0

Code Classification
  • Neoplasms (140–239)
    • Malignant neoplasm of respiratory and intrathoracic organs (160-165)
      • 164 Malignant neoplasm of thymus, heart, and mediastinum

Information for Medical Professionals

Convert to ICD-10 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • C37 - Malignant neoplasm of thymus

Index of Diseases and Injuries
References found for the code 164.0 in the Index of Diseases and Injuries:

Information for Patients

Thymus Cancer

Also called: Thymoma

The thymus is a small organ in your upper chest, under your breastbone. Before birth and during childhood, the thymus helps the body make a type of white blood cell. These cells help protect you from infections.

Cancer of the thymus is rare. You are more likely to get it if you have other diseases such as myasthenia gravis, lupus or rheumatoid arthritis. Sometimes there are no symptoms. Other times, thymus cancer can cause

  • A cough that doesn't go away
  • Chest pain
  • Trouble breathing

Doctors use a physical exam, imaging tests, and a biopsy to diagnose thymus cancer. The most common treatment is surgery to remove the tumor. Other options include radiation therapy, chemotherapy, and hormone therapy.

NIH: National Cancer Institute

  • Chest radiation - discharge
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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