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Home/Diagnosis/ICD-10 Coding for Anal Cancer

ICD-10 Coding for Anal Cancer

C21.0
C21.1

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

Also Known as:
Anus Cancer
Cancer of the Anal Canal
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Key Information: ICD-10 Coding for Anal Cancer

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

Use ICD-10 code C21.0 for malignant neoplasm of anus, unspecified, ensuring proper documentation in clinical notes.

Primary ICD-10-CM Codes

Malignant neoplasm of anus, unspecified

Billable Code
C21.0
Billable

Diagnostic Criteria

  • • Confirmed malignancy in the anal region

Applicable To

  • • Cancer of the anus not otherwise specified

Important Notes

  • • Ensure histological confirmation is documented to avoid unspecified coding.

Malignant neoplasm of anal canal

Billable Code
C21.1
Billable

Diagnostic Criteria

  • • Biopsy confirming squamous cell carcinoma
  • • HPV status documented

Applicable To

  • • Cancer of the anal canal

Important Notes

  • • Document HPV status for accurate coding.
Ancillary Codes

Additional codes that may be used with this diagnosis

Z85.038

Personal history of malignant neoplasm of large intestine

Use for patients with a history of anal cancer post-treatment.

B97.7

Papillomavirus as the cause of diseases classified elsewhere

Use to indicate HPV involvement in the cancer.

Frequently Asked Questions

What is the ICD-10 code for anal cancer?

The ICD-10 code for anal cancer is primarily C21.0 for unspecified anal cancer and C21.1 for cancer of the anal canal.

How is HPV status documented in anal cancer cases?

HPV status should be documented through p16 immunohistochemistry or PCR testing, as it impacts coding and treatment decisions.

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