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ICD-10-CM Code C21.0
Malignant neoplasm of anus, unspecified

BILLABLE
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.
| ICD-10 from 2011 - 2016

C21.0 is a billable ICD code used to specify a diagnosis of malignant neoplasm of anus, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis.


The ICD code C21 is used to code Colorectal cancer

Colorectal cancer (also known as colon cancer, rectal cancer, or bowel cancer) is the development of cancer in the colon or rectum (parts of the large intestine). It is due to the abnormal growth of cells that have the ability to invade or spread to other parts of the body. Signs and symptoms may include blood in the stool, a change in bowel movements, weight loss, and feeling tired all the time.

Specialty: Oncology
MeSH Codes: , ,
ICD 9 Codes: 153.0, 154.0, 154.1

Diagram of the lower gastrointestinal tract

Source: Wikipedia

MS-DRG Mapping

  • DRG Group #374-376 - Digestive malignancy with MCC.
  • DRG Group #374-376 - Digestive malignancy with CC.
  • DRG Group #374-376 - Digestive malignancy without CC or MCC.

Related Concepts SNOMET-CT

  • Adenocarcinoma of anus (disorder)

Coding Advice SNOMET-CT

  • Possible requirement for morphology code

ICD-10-CM Alphabetical Index References for 'C21.0 - Malignant neoplasm of anus, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code C21.0. Click on any term below to browse the alphabetical index.

ICD-10-CM Neoplasms Index References for 'C21.0 - Malignant neoplasm of anus, unspecified'

The ICD-10-CM Neoplasms Index links the below-listed medical terms to the ICD code C21.0. Click on any term below to browse the neoplasms index.

Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)

Malignant neoplasm of anus, unspecified site (exact match)

This is the official exact match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that in all cases where the ICD9 code 154.3 was previously used, C21.0 is the appropriate modern ICD10 code.


Parent Code: C21 - Malignant neoplasm of anus and anal canal

** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/C210