Brain Mass ICD-10-CM Codes

Learn about the brain mass ICD-10-CM codes you can use through this guide.

By Matt Olivares on Jun 11, 2025.

Fact Checked by Karina Jimenea.

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Brain Mass ICD-10-CM Codes

What ICD-10 codes are used for brain mass? 

A brain mass is an abnormal growth or tumor in the brain that can have various causes and require different treatments. The International Classification of Diseases, Tenth Revision (ICD-10), provides a standardized system for coding diagnoses, including brain mass conditions. Here are some commonly used ICD-10 codes for brain mass, along with their clinical descriptions:

  • D33.0 - Benign neoplasm of brain, supratentorial: This code is used to classify non-cancerous brain tumors located in the supratentorial region. These tumors usually have a slow growth rate and do not invade surrounding tissues.
  • D33.1 - Benign neoplasm of brain, infratentorial: This code is used for benign brain tumors located in the infratentorial region. These tumors can affect the cerebellum, brainstem, or other structures below the tentorium.
  • C71.0 - Malignant neoplasm of cerebrum, except lobes and ventricles: This code is used for malignant (cancerous) tumors in the cerebrum, not counting lobes and ventricles. These tumors can grow rapidly, invade nearby tissues, and may require aggressive treatment approaches.
  • C71.1 - Malignant neoplasm of frontal lobe: This code is used to classify malignant brain tumors located in the frontal lobe. These tumors can be aggressive and may cause symptoms related to the compression of vital structures in the lower part of the brain.
  • C71.7 - Malignant Neoplasm of brain stem: This code is used when the malignant brain tumor is located in the brain stem.
  • D32.0 - Benign neoplasm of cerebral meninges: Used for non-cancerous tumors that develop in the cerebral meninges, which are the protective membranes covering the brain and spinal cord. These tumors can cause symptoms such as headaches or changes in neurological function.
  • C70.0 - Malignant Neoplasm of cerebral meninges: This code is used for malignant tumors originating in the cerebral meninges. These tumors can be invasive and require a multidisciplinary approach for treatment, including surgery, radiation, and chemotherapy.
  • D42.0 - Neoplasm of uncertain behavior of cerebral meninges: Used when there is a brain mass with uncertain behavior, meaning it is difficult to determine whether it is benign or malignant. Further diagnostic testing and monitoring may be required to make an accurate diagnosis.
  • D43.0 - Neoplasm of uncertain behavior of brain, supratentorial: Similar to D42.0, D43.0 is used when there is uncertainty regarding the behavior of a tumor located in the supratentorial area. Close observation and additional testing may be necessary to determine the appropriate action.
  • C79.31 - Secondary malignant neoplasm of brain: This ICD-10 code is used when a brain mass is a secondary tumor resulting from the spread (metastasis) of cancer from another primary site in the body. Primary cancer should be coded separately.

Which brain mass ICD codes are billable?

All of the aforementioned brain mass ICD-10-CM codes are valid and billable.

Clinical information

When it comes to brain masses, clinical information plays a crucial role in understanding and managing these conditions effectively. Here are some key points to consider:

  • Brain masses can encompass various conditions, including benign and malignant tumors and other abnormal growths in the brain or its surrounding structures.
  • Clinical evaluation of a brain mass involves thoroughly assessing the patient's medical history, neurological symptoms, and physical examination findings.
  • Diagnostic imaging techniques such as magnetic resonance imaging (MRI), computed tomography (CT), or positron emission tomography (PET) scans are commonly used to visualize and characterize brain masses.
  • Histopathological analysis of a tissue sample obtained through biopsy or surgical resection is often necessary to determine the precise nature of the brain mass, whether it is benign or malignant, and to guide further treatment decisions.
  • The symptoms and consequences of brain masses can vary significantly depending on their size, location, and aggressiveness. Common symptoms may include headaches, seizures, cognitive changes, motor or sensory deficits, and alterations in mood or behavior.
  • Treatment options for brain masses may include surgery, radiation therapy, chemotherapy, targeted therapies, or a combination of these modalities. The choice of treatment depends on factors such as the type and grade of the tumor, its location, the patient's overall health, and individualized treatment goals.
  • Close monitoring and follow-up care are crucial for individuals diagnosed with a brain mass to assess treatment response, manage potential side effects or complications, and detect any recurrence or progression of the condition.

Synonyms include

  • Brain tumor
  • Intracranial mass
  • Cerebral growth
  • Cranial neoplasm
  • Encephalic lesion
  • Intracranial tumor
  • Cerebral mass
  • Cranial tumor
  • Neoplasms across the brain and central nervous system
  • Neoplasms putting pressure on cranial nerves
  • Unspecified malignant neoplasm of brain
  • Brain and spinal meninges
  • Cancer cells forming a mass in brain
  • Mass in the autonomic nervous system

Popular search terms for brain mass ICD-10-CM codes

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  • ICD-10 brain mass
  • Brain mass diagnosis codes
  • ICD-10 codes for brain mass

Frequently asked questions

Can brain masses cause neurological complications?

Yes, brain masses can cause neurological complications depending on their location and size. These complications may include seizures, sensory or motor deficits, cognitive impairments, or changes in personality or behavior.

Can brain masses be prevented?

As the causes of brain masses are multifactorial, prevention strategies are limited. Regular medical check-ups and early detection of any potential symptoms may aid in early intervention and management.

Are there any long-term effects of brain mass treatment?

The long-term effects of brain mass treatment can vary depending on the specific treatment modality used and individual factors. Some individuals may experience residual neurological deficits or side effects from treatments such as radiation or chemotherapy.

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