DocScrib
How it WorksPricingBlog
Sign InSign UpBook a Demo
DocScrib

AI-powered medical documentation platform streamlining healthcare workflows through intelligent transcription and clinical note generation.

Book a Demo

Product

  • Medical Templates
  • Pricing
  • Integrations
  • Security & Compliance

Resources

  • Blog
  • Documentation
  • Case Studies

Contact

  • support@docscrib.com
  • +1 (555) 123-4567
  • 123 Healthcare Blvd
    Medical District, CA 90210
© 2025 DocScrib. All rights reserved.
Privacy PolicyTerms of ServiceCookie Policy
Home/Diagnosis/ICD-10 Coding for Unspecified Cancer

ICD-10 Coding for Unspecified Cancer

C80.1
C79.9

Complete ICD-10-CM coding and documentation guide for icd-10 coding for unspecified cancer includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Cancer of Unknown Primary
Malignant Neoplasm, Unspecified
Join 10,000+ Happy Clinicians

The AI Medical Scribe for Happiest Clinicians

Save 2+ hours daily with instant clinical documentation.
Our AI scribe listens, understands, and generates comprehensive medical notes so you can focus on patient care.

Start Free Trial
No credit card required•HIPAA compliant
Recording Controls
Start recording to see live transcription
Live Conversation - Try For Free!
Real-time transcription with automatic speaker identification

Ready to Record

Start recording to see live conversation transcription

Key Information: ICD-10 Coding for Unspecified Cancer

Essential facts and insights about ICD-10 Coding for Unspecified Cancer

Use ICD-10 code C80.1 for malignant neoplasm, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Malignant neoplasm, unspecified

Billable Code
C80.1
Billable

Diagnostic Criteria

clinical:
  • • No primary site identified after comprehensive diagnostic workup
documentation:
  • • Explicit documentation of 'primary site undetermined'

Applicable To

  • • Cancer of unknown primary site

Important Notes

  • • Ensure documentation explicitly states 'primary site undetermined' to justify the use of C80.1.

Secondary malignant neoplasm, unspecified

Billable Code
C79.9
Billable

Diagnostic Criteria

clinical:
  • • Confirmed metastasis with no primary site identified

Applicable To

  • • Metastatic cancer, site unspecified

Important Notes

  • • Ensure metastasis is confirmed through imaging or biopsy.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z51.11

Encounter for antineoplastic chemotherapy

Use when the patient is receiving chemotherapy for the unspecified cancer.

Frequently Asked Questions

How is cancer of unknown primary coded in ICD-10?

Cancer of unknown primary is coded as C80.1 in ICD-10, used when the primary site cannot be determined after a thorough diagnostic workup.

What is the ICD-10 code for unspecified cancer?

The ICD-10 code for unspecified cancer is C80.1, used when the primary site is not identified.

Quick Navigation
All DiagnosesICD-10 Codes

Related Resources

How Medical Coding WorksBrowse All Codes