ICD-10-CM Code Z85.23

Personal history of malignant neoplasm of thymus

Version 2020 Non-Billable Code

Not Valid for Submission

Z85.23 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of personal history of malignant neoplasm of thymus. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:Z85.23
Short Description:Personal history of malignant neoplasm of thymus
Long Description:Personal history of malignant neoplasm of thymus

Consider the following ICD-10 codes with a higher level of specificity:

  • Z85.230 - Personal history of malignant carcinoid tumor of thymus
  • Z85.238 - Personal history of other malignant neoplasm of thymus

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)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Thymus Cancer

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


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