C21.0
BillableMalignant neoplasm of anus, unspecified
Malignant neoplasm of anus, unspecified
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- Kaposi's sarcoma of gastrointestinal sites (C46.4)
Excludes 2
Conditions not included here, but the patient may have both
- gastrointestinal stromal tumors (C49.A-)
- malignant carcinoid tumors of the colon (C7A.02-)
- malignant melanoma of anal margin (C43.51)
- malignant melanoma of anal skin (C43.51)
- malignant melanoma of perianal skin (C43.51)
- other and unspecified malignant neoplasm of anal margin (C44.500, C44.510, C44.520, C44.590)
- other and unspecified malignant neoplasm of anal skin (C44.500, C44.510, C44.520, C44.590)
- other and unspecified malignant neoplasm of perianal skin (C44.500, C44.510, C44.520, C44.590)
Also Known As / Clinical Terms
SNOMED CT
- Primary malignant neoplasm of anus93676009
- Malignant neoplasm of rectum, rectosigmoid junction and anus187760008
- Malignant neoplasm of rectosigmoid junction363414004
- Malignant tumor of rectosigmoid junction363414004
- Malignant tumour of rectosigmoid junction363414004
- Rectosigmoid colon cancer363414004
- Malignant neoplasm of anus363490009
- Malignant tumor of anus363490009
- Malignant tumour of anus363490009
- Adenocarcinoma of anus423607006
- Adenocarcinoma of anorectum447886005
- Anorectal adenocarcinoma447886005
- Carcinoma of anus448315008
- Malignant epithelial neoplasm of anus448315008
- Primary squamous cell carcinoma of anus723265000
- Lymphoma of anus1153356005
- Malignant mesenchymal neoplasm of anus1156811000
- Primary malignant mesenchymal neoplasm of anus1254825003
- Primary sarcoma of perineum688061000119104
- Primary adenocarcinoma of anus184741000119107
UMLS
- Malignant Anal NeoplasmC0153446
- Malignant Anal TumorC0153446
- Malignant Neoplasm of AnusC0153446
- Malignant Neoplasm of the AnusC0153446
- Malignant Tumor of AnusC0153446
- Malignant Tumor of the AnusC0153446
- Malignant neoplasm of anusC0153446
- Malignant neoplasm of anus (disorder)C0153446
- Malignant neoplasm of anus, unspecifiedC0153446
- Malignant tumor of anusC0153446
- Malignant tumour of anusC0153446
- anal cancerC0153446
- anal cancersC0153446
- anus cancerC0153446
- cancer anusC0153446
- cancer of the anusC0153446
Frequently Asked Questions
What is ICD-10 code C21.0?
ICD-10-CM code C21.0 represents "Malignant neoplasm of anus, unspecified". It is a billable/specific code that can be used on a claim.
Is C21.0 a billable code?
Yes, C21.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is C21.0 in?
C21.0 is in Chapter 2: Neoplasms (codes C00-D49).
What codes cannot be used with C21.0?
C21.0 has Excludes1 notes indicating codes that cannot be used together with it, including: Kaposi's sarcoma of gastrointestinal sites (C46.4).
What SNOMED CT codes does C21.0 map to?
C21.0 maps to 13 SNOMED CT concepts: 688061000119104, 447886005, 423607006, 448315008, 1153356005, and 8 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for C21.0?
C21.0 is linked to 1 UMLS Concept Unique Identifier: C0153446. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.