ICD-10-CM Code C79.40

Secondary malignant neoplasm of unspecified part of nervous system

Version 2020 Billable Code Neoplasm Malignant Secondary

Valid for Submission

C79.40 is a billable code used to specify a medical diagnosis of secondary malignant neoplasm of unspecified part of nervous system. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code C79.40 might also be used to specify conditions or terms like metastasis to peripheral nerve or secondary malignant neoplasm of central nervous system or secondary malignant neoplasm of nervous system.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: central nervous system or nervous system (central) or pia mater .

ICD-10:C79.40
Short Description:Secondary malignant neoplasm of unsp part of nervous system
Long Description:Secondary malignant neoplasm of unspecified part of nervous system

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Metastasis to peripheral nerve
  • Secondary malignant neoplasm of central nervous system
  • Secondary malignant neoplasm of nervous system

Convert C79.40 to ICD-9

  • 198.4 - Sec malig neo nerve NEC (Approximate Flag)

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
      • Secondary malignant neoplasm of other and unspecified sites (C79)

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

Table of Neoplasms

The code C79.40 is included in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»central nervous system
C72.9C79.40
»nervous system (central)
C72.9C79.40D33.9D43.9D49.7
»pia mater
C70.9C79.40D32.9D42.9D49.7

Information for Patients


Cancer

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

NIH: National Cancer Institute


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Neurologic Diseases

The brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood.

There are more than 600 neurologic diseases. Major types include

  • Diseases caused by faulty genes, such as Huntington's disease and muscular dystrophy
  • Problems with the way the nervous system develops, such as spina bifida
  • Degenerative diseases, where nerve cells are damaged or die, such as Parkinson's disease and Alzheimer's disease
  • Diseases of the blood vessels that supply the brain, such as stroke
  • Injuries to the spinal cord and brain
  • Seizure disorders, such as epilepsy
  • Cancer, such as brain tumors
  • infections, such as meningitis

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