C21.1
BillableMalignant neoplasm of anal canal
Malignant neoplasm of anal canal
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Malignant neoplasm of anal sphincter
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 anal canal93669004
- Primary malignant neoplasm of perianal skin93956001
- Malignant melanoma of perineum188054000
- Cancer anal melanoma276821000
- Malignant melanoma of anus276821000
- Carcinoma of anal canal285310000
- Cancer of anal canal363352004
- Malignant neoplasm of anal canal363352004
- Malignant tumor of anal canal363352004
- Malignant tumour of anal canal363352004
- Perianal Paget disease403947009
- Perianal Paget's disease403947009
- Adenocarcinoma of anus423607006
- Adenocarcinoma of anorectum447886005
- Anorectal adenocarcinoma447886005
- Primary squamous cell carcinoma of anal canal722542000
- Primary malignant melanoma of anal canal722543005
- Primary squamous cell carcinoma of anus723265000
- Primary malignant melanoma of anus723281005
- Adenocarcinoma of anal canal764845008
- Primary carcinoma of anal canal1259431008
- Primary perianal Paget disease1259790005
- Primary perianal Paget's disease1259790005
- Primary Paget disease of anal canal1259796004
- Primary Paget's disease of anal canal1259796004
- Primary extramammary Paget disease of skin1268956001
- Primary extramammary Paget's disease of skin1268956001
- Paget disease of anal canal236811000119101
- Pagets disease of anal canal236811000119101
UMLS
- Anal canal cancerC0153445
- Anal canal cancer NOSC0153445
- Anal canal neoplasms malignantC0153445
- Cancer of anal canalC0153445
- Malignant Neoplasm of Anal CanalC0153445
- Malignant neoplasm of anal canalC0153445
- Malignant neoplasm of anal canal (disorder)C0153445
- Malignant tumor of anal canalC0153445
- Malignant tumour of anal canalC0153445
- Malignant neoplasm of anal sphincterC0864874
Frequently Asked Questions
What is ICD-10 code C21.1?
ICD-10-CM code C21.1 represents "Malignant neoplasm of anal canal". It is a billable/specific code that can be used on a claim.
Is C21.1 a billable code?
Yes, C21.1 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is C21.1 in?
C21.1 is in Chapter 2: Neoplasms (codes C00-D49).
What codes cannot be used with C21.1?
C21.1 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 C21.1 map to?
C21.1 maps to 19 SNOMED CT concepts: 764845008, 447886005, 423607006, 276821000, 363352004, and 14 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for C21.1?
C21.1 is linked to 2 UMLS Concept Unique Identifiers: C0153445, C0864874. 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.