2021 ICD-10-CM Code C71.9

Malignant neoplasm of brain, unspecified

Version 2021
Billable Code
Unspecified Code
Neoplasm Malignant Primary

Valid for Submission

C71.9 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of brain, unspecified. The code C71.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code C71.9 might also be used to specify conditions or terms like anaplastic astrocytoma of brain, anaplastic astrocytoma of central nervous system, anaplastic glioma of brain, astroblastoma of brain, astrocytoma of brain , carcinoma of brain, etc.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic brain NEC ; Neoplasm, neoplastic cranial (fossa, any) ; Neoplasm, neoplastic fossa (of) ; Neoplasm, neoplastic fossa (of) anterior (cranial) ; Neoplasm, neoplastic fossa (of) cranial ; Neoplasm, neoplastic fossa (of) middle (cranial) ; Neoplasm, neoplastic fossa (of) posterior (cranial) ; etc

Unspecified diagnosis codes like C71.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:C71.9
Short Description:Malignant neoplasm of brain, unspecified
Long Description:Malignant neoplasm of brain, unspecified

Code Classification

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code C71.9 are found in the index:

Approximate Synonyms

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

Convert C71.9 to ICD-9 Code

Table of Neoplasms

The code C71.9 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
»Neoplasm, neoplastic
  »brain NEC
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »cranial (fossa, any)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »fossa (of)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »fossa (of)
    »anterior (cranial)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »fossa (of)
    »cranial
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »fossa (of)
    »middle (cranial)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »fossa (of)
    »posterior (cranial)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »intracranial NEC
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »motor tract
    »brain
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »posterior fossa (cranial)
C71.9C79.31D33.2D43.2D49.6
»Neoplasm, neoplastic
  »suprasellar (region)
C71.9C79.31D33.2D43.2D49.6

Information for Patients


Brain Tumors

A brain tumor is a growth of abnormal cells in the tissues of the brain. Brain tumors can be benign, with no cancer cells, or malignant, with cancer cells that grow quickly. Some are primary brain tumors, which start in the brain. Others are metastatic, and they start somewhere else in the body and move to the brain.

Brain tumors can cause many symptoms. Some of the most common are

Doctors diagnose brain tumors by doing a neurologic exam and tests including an MRI, CT scan, and biopsy. Treatment options include watchful waiting, surgery, radiation therapy, chemotherapy, and targeted therapy. Targeted therapy uses substances that attack cancer cells without harming normal cells. Many people get a combination of treatments.

NIH: National Cancer Institute


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)