ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesC79.51

C79.51

Billable

Secondary malignant neoplasm of bone

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 C79.51 is a billable code used to indicate a diagnosis of secondary malignant neoplasm of bone.

Key Diagnostic Point:

Secondary malignant neoplasm of bone refers to the presence of cancerous cells in the bone that have metastasized from a primary tumor located elsewhere in the body. This condition is often seen in patients with advanced cancer, where the primary tumor may be unknown or undiagnosed at the time of bone involvement. Common primary sites that lead to bone metastases include the breast, prostate, lung, and kidney. The metastatic process involves the spread of cancer cells through the bloodstream or lymphatic system, leading to the formation of secondary tumors in the bone. Symptoms may include bone pain, fractures, and elevated calcium levels. Diagnosis typically involves imaging studies such as X-rays, CT scans, or MRIs, along with biopsy when necessary. Staging of metastatic bone disease is crucial for treatment planning and may involve the use of the TNM classification system. Palliative care considerations are essential, focusing on pain management and improving the quality of life for patients with advanced disease.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Determining the primary site of cancer when it is unknown.
  • Differentiating between primary bone tumors and secondary bone neoplasms.
  • Staging considerations that may affect treatment options.
  • Documentation of metastatic disease progression.

Audit Risk Factors

  • Inadequate documentation of the primary cancer site.
  • Failure to document staging of the metastatic disease.
  • Misclassification of primary versus secondary tumors.
  • Lack of comprehensive treatment plans in medical records.

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed history of the primary cancer, treatment history, and current status of metastatic disease.

Common Clinical Scenarios

Patients presenting with bone pain and known history of cancer, or those with new bone lesions.

Billing Considerations

Accurate staging and treatment plans must be documented to support coding.

Radiology

Documentation Requirements

Imaging reports must clearly indicate the presence of metastatic lesions and their characteristics.

Common Clinical Scenarios

Imaging studies performed for patients with known malignancies to assess for bone metastases.

Billing Considerations

Radiologists should ensure that reports specify whether findings are consistent with metastatic disease.

Coding Guidelines

Inclusion Criteria

Use C79.51 When
  • According to ICD
  • 10 coding guidelines, C79
  • 51 should be used when there is clear documentation of secondary malignant neoplasm of bone
  • It is important to ensure that the primary site of cancer is documented, as this may affect treatment and management

Exclusion Criteria

Do NOT use C79.51 When
  • Exclusion criteria include primary bone tumors, which should be coded separately

Related ICD-10 Codes

Related CPT Codes

77080CPT Code

Bone density study

Clinical Scenario

Used to assess bone health in patients with known metastatic disease.

Documentation Requirements

Document the reason for the study and any relevant history of cancer.

Specialty Considerations

Oncologists should ensure that the study is justified based on the patient's cancer history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of secondary malignancies, improving the accuracy of data collection and reimbursement processes. C79.51 provides a clear distinction between secondary and primary malignancies, which is crucial for treatment planning and research.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of secondary malignancies, improving the accuracy of data collection and reimbursement processes. C79.51 provides a clear distinction between secondary and primary malignancies, which is crucial for treatment planning and research.

Reimbursement & Billing Impact

reimbursement processes. C79.51 provides a clear distinction between secondary and primary malignancies, which is crucial for treatment planning and research.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is the significance of coding C79.51 accurately?

Accurate coding of C79.51 is crucial for appropriate treatment planning, reimbursement, and data collection. It ensures that patients receive the necessary palliative care and that healthcare providers are compensated for the services rendered.