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Home/Diagnosis/ICD-10 Coding for Merkel Cell Carcinoma

ICD-10 Coding for Merkel Cell Carcinoma

C4A.0
C4A.1
C7B.1

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

Also Known as:
Neuroendocrine Carcinoma of the Skin
Primary Small Cell Carcinoma of the Skin
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Key Information: ICD-10 Coding for Merkel Cell Carcinoma

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

Use ICD-10 code C4A.0 for merkel cell carcinoma of lip, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Merkel cell carcinoma of lip

Billable Code
C4A.0
Billable

Diagnostic Criteria

  • • Biopsy confirms MCC on the lip.

Applicable To

  • • MCC of upper lip
  • • MCC of lower lip

Important Notes

  • • Ensure site specificity is documented.

Merkel cell carcinoma of eyelid, including canthus

Non-Billable
C4A.1
Non-Billable

Diagnostic Criteria

  • • Histopathological confirmation of MCC
  • • Imaging to rule out metastasis

Applicable To

  • • MCC of upper eyelid
  • • MCC of lower eyelid

Important Notes

  • • Document laterality if applicable.

Secondary Merkel cell carcinoma

Billable Code
C7B.1
Billable

Diagnostic Criteria

  • • Imaging confirming metastatic spread
  • • Pathology report indicating metastasis

Applicable To

  • • Metastatic MCC to lymph nodes
  • • Metastatic MCC to organs

Important Notes

  • • Ensure primary site is coded first.
Frequently Asked Questions

What is the ICD-10 code for Merkel cell carcinoma?

The ICD-10 code for Merkel cell carcinoma is C4A, with site-specific extensions such as C4A.0 for the lip.

How do you code metastatic Merkel cell carcinoma?

For metastatic Merkel cell carcinoma, use C7B.1 alongside the primary site code.

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