Diagnosis Code C21.1
Information for Medical Professionals
The diagnosis code C21.1 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)
- 374 - DIGESTIVE MALIGNANCY WITH MCC
- 375 - DIGESTIVE MALIGNANCY WITH CC
- 376 - DIGESTIVE MALIGNANCY WITHOUT CC/MCC
Convert to ICD-9 General Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
- 154.2 - Malig neopl anal canal
- Carcinoma of anal canal
- Malignant epithelial neoplasm of anus
- Malignant tumor of anal canal
- Malignant tumor of anus and anal canal
- Primary malignant neoplasm of anal canal
- Primary malignant neoplasm of anus
Index of Diseases and Injuries
References found for the code C21.1 in the Index of Diseases and Injuries:
- Inclusion Terms: Inclusion terms
List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Malignant neoplasm of anal sphincter
Table of Neoplasms
The code C21.1 is included in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.
Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.
The Tabular must be reviewed for the complete diagnosis code.
Information for Patients
The anus is where stool leaves your body when you go to the bathroom. It is made up of your outer layers of skin and the end of your large intestine. Anal cancer is a disease in which cancer cells form in the tissues of the anus.
Anal cancer is rare. It is more common in smokers and people over 50. You are also at higher risk if you have HPV, have anal sex, or have many sexual partners.
Symptoms include bleeding, pain, or lumps in the anal area. Anal itching and discharge can also be signs of anal cancer.
Doctors use tests that examine the anus to diagnose anal cancer. They include a physical exam, endoscopy, ultrasound, and biopsy.
Treatments include radiation therapy, chemotherapy, and surgery.
NIH: National Cancer Institute
- After chemotherapy - discharge (Medical Encyclopedia)
- Anal cancer (Medical Encyclopedia)
- Anoscopy (Medical Encyclopedia)
- Pelvic (between the hips) radiation - discharge (Medical Encyclopedia)
- Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
- What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)