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Home/Diagnosis/ICD-10 Coding for Metastatic Squamous Cell Carcinoma

ICD-10 Coding for Metastatic Squamous Cell Carcinoma

C79.8
C80.1

Complete ICD-10-CM coding and documentation guide for icd-10 coding for metastatic squamous cell carcinoma includes clinical validation requirements, medical necessity guidelines, and coding policies.

Also Known as:
Metastatic SCC
Secondary Squamous Cell Carcinoma
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Key Information: ICD-10 Coding for Metastatic Squamous Cell Carcinoma

Essential facts and insights about ICD-10 Coding for Metastatic Squamous Cell Carcinoma

Use ICD-10 code C79.8 for secondary malignant neoplasm of other specified sites, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Secondary malignant neoplasm of other specified sites

Non-Billable
C79.8
Non-Billable

Diagnostic Criteria

clinical:
  • • Histologic confirmation of SCC in metastatic site
  • • Radiologic correlation (CT/MRI showing lesion)
  • • IHC markers confirming epithelial origin (CK5/6, p40)
documentation:
  • • Clear documentation of metastatic site

Applicable To

  • • Metastatic squamous cell carcinoma to specific sites

Important Notes

  • • Ensure documentation clearly states the metastatic nature and site.

Malignant (primary) neoplasm, unspecified

Billable Code
C80.1
Billable

Diagnostic Criteria

clinical:
  • • Negative full skin exam report
  • • PET-CT showing no primary lesion
  • • Endoscopic evaluation when applicable

Applicable To

  • • Unknown primary site of malignancy

Important Notes

  • • Use when primary site cannot be determined after thorough investigation.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z85.810

Personal history of squamous cell carcinoma

Use to indicate a history of squamous cell carcinoma.

Frequently Asked Questions

How is metastatic squamous cell carcinoma coded in ICD-10?

Metastatic squamous cell carcinoma is primarily coded using C79.8 for secondary sites, with C80.1 used when the primary site is unknown.

What documentation is needed for coding metastatic SCC?

Documentation must include histological confirmation, imaging results, and details of both primary and metastatic sites.

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