ICD-10 Diagnosis Code Z85.23

Personal history of malignant neoplasm of thymus

Diagnosis Code Z85.23

ICD-10: Z85.23
Short Description: Personal history of malignant neoplasm of thymus
Long Description: Personal history of malignant neoplasm of thymus
This is the 2017 version of the ICD-10-CM diagnosis code Z85.23

Not Valid for Submission
The code Z85.23 is a "header" and not valid for submission for HIPAA-covered transactions.

Code Classification
  • Factors influencing health status and contact with health services (Z00–Z99)
    • Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)
      • Personal history of malignant neoplasm (Z85)

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 (Medical Encyclopedia)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)


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