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ICD-10 Guide
DiagnosesMetastatic Renal Cell Carcinoma

Metastatic Renal Cell Carcinoma

ICD-10 Coding for Metastatic Renal Cell Carcinoma(C64.1, C64.2, C78.00, C79.51)

PRIMARY SPECIALTYOncology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Metastatic Renal Cell Carcinoma?
Essential facts and insights about Metastatic Renal Cell Carcinoma

Key Clinical Considerations:

  • Hematuria, flank pain, weight loss, and fatigue
  • CT scan, MRI, or ultrasound showing renal mass with metastases
  • Palpable abdominal mass, flank tenderness, and signs of paraneoplastic syndromes

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history, physical examination findings, imaging results, and pathology reports
  • ICD-10-CM codes for metastatic renal cell carcinoma (C64.9)
  • Examples include detailed descriptions of tumor size, location, and metastasis sites

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for metastatic cancer coding; avoid using unspecified codes when more specific codes are available.
  • Common errors include misclassifying the primary site or failing to document metastasis.

Code Exclusions

Important Exclusions

  • Primary renal tumors without metastasis, benign renal tumors
  • Alternative codes for renal cell carcinoma without metastasis (C64.0-C64.8)

Related ICD-10 Codes

Primary Codes
C64.9
Malignant neoplasm of unspecified kidney, except renal pelvis
Ancillary Codes
Z85.5
Differential Codes
C65.1
C65.2
C34.90
C41.9

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Oncology

Specialty Applications

  • Adults diagnosed with renal cell carcinoma and evidence of metastasis
  • Oncology clinics, hospitals, and outpatient settings

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Comprehensive patient history, imaging studies, and pathology results must be documented.

What are the billing considerations?

Ensure accurate coding to reflect the complexity of the case and any additional treatments provided.