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ICD-10-CM · C79.31GeneralSystemic

Metastatic Brain Tumor

Find comprehensive information on metastatic brain tumor diagnosis, including ICD-10 codes, clinical documentation requirements, treatment options, and prognosis. Learn about the different types of brain metastases, diagnostic imaging like MRI and CT scans, and the role of healthcare professionals in managing this condition. Explore resources for patients and caregivers, covering symptoms, staging, and palliative care. This resource provides valuable insights for physicians, coders, and other healthcare providers involved in the care of patients with secondary brain tumors.

Also known as
Secondary Brain CancerBrain Metastasis
Definition

Cancer spread to the brain from another site.

Clinical signs

Headaches, seizures, cognitive changes, weakness, balance problems.

Common settings

Neuro-oncology, radiation oncology, neurosurgery clinics.

Related Codes

ICD-10 Code Families

Complete code families applicable to C79.31

C79.31
Secondary malignant neoplasm of brain
C79.89
Secondary malignant neoplasm of other specified sites
C70-C72
Malignant neoplasms of brain
C80.0
Disseminated malignant neoplasm
Code Comparison

When to use each related code

DescriptionWhen to use
Metastatic Brain TumorCancer spread to brain from another primary site. Code after primary confirmed.
Primary Brain TumorCancer originating in the brain. Use when no other primary cancer found.
Brain Lesion NOSUnspecified brain abnormality. Use when further investigation needed or benign.
Documentation

Best-practice checklist

  • ✓Metastatic brain tumor: Document primary cancer site
  • ✓Brain metastasis: Imaging confirmation (MRI/CT)
  • ✓Metastatic brain tumor: Histopathology if available
  • ✓Document neurological exam findings/symptoms
  • ✓Brain metastasis: Treatment plan (surgery/radiation/chemo)
Coding & Audit Risks

Common pitfalls to avoid

Primary Site Documentation

Missing or unclear documentation of the primary cancer site can lead to inaccurate coding and affect treatment planning.

Histology Confirmation

Lack of histological confirmation for metastasis can impact coding specificity and reimbursement. Molecular testing impacts code selection.

Number of Metastases

Insufficient documentation specifying single vs multiple metastases may affect coding accuracy and subsequent radiation planning.

Mitigation

Best-practice tips

  • 01Code accurately using ICD-10-CM C79.31 for documentation integrity.
  • 02Document symptom onset, neurological exams, and imaging results for CDI.
  • 03Ensure medical necessity for diagnostic tests per payer guidelines for compliance.
  • 04Timely pathology reports with detailed histology support optimal coding and CDI.
  • 05Consistent clinical documentation improves patient care and reduces compliance risks.
Clinical Decision Support

Step-by-step checklist

  1. 1

    Verify primary cancer diagnosis (ICD-10 C79.31)

  2. 2

    Confirm brain imaging (MRI brain with contrast) evidence

  3. 3

    Document neurological exam findings (patient safety)

  4. 4

    Check for molecular testing results (EGFR, BRAF)

  5. 5

    Review performance status (ECOG, Karnofsky) for treatment planning

Documentation Template

Ready-to-paste narrative

Patient presents with signs and symptoms suggestive of metastatic brain tumor.  Clinical presentation includes [specific symptoms e.g., headaches, seizures, cognitive impairment, focal neurological deficits, nausea, vomiting, balance difficulties].  Onset of symptoms was [timeframe e.g., gradual over several weeks, sudden].  Patient history includes [relevant medical history e.g., primary cancer diagnosis of [type] with stage [stage], previous brain MRI findings, relevant family history].  Neurological examination reveals [specific findings e.g., cranial nerve palsies, hemiparesis, sensory deficits, altered mental status].  Imaging studies, including MRI of the brain with and without contrast, demonstrate [specific findings e.g., multiple enhancing lesions, single lesion with surrounding edema, location of lesions].  Differential diagnosis includes primary brain tumor, abscess, stroke, and demyelinating disease.  Based on the clinical picture, imaging findings, and patient history, the diagnosis of metastatic brain tumor is most likely.  Treatment plan includes consultation with oncology, neurosurgery, radiation oncology, and palliative care as appropriate.  Options for management include corticosteroids for symptom control, surgical resection if feasible, stereotactic radiosurgery, whole-brain radiation therapy, and systemic therapies targeted at the primary cancer.  Patient and family were counseled regarding prognosis and treatment options.  Referral to social work and support services provided.  Follow-up scheduled in [timeframe].  ICD-10 code C79.31 (secondary malignant neoplasm of brain) is assigned.  CPT codes for evaluation and management, imaging studies, and procedures will be documented separately.

Clinical accuracy: This information is provided for documentation and coding guidance and should not replace professional medical judgment.

Coding standard: ICD-10-CM, current FY guidelines.