ICD-10-CM Code C21.2

Malignant neoplasm of cloacogenic zone

Version 2020 Billable Code Neoplasm Malignant Primary

Valid for Submission

C21.2 is a billable code used to specify a medical diagnosis of malignant neoplasm of cloacogenic zone. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code C21.2 might also be used to specify conditions or terms like malignant tumor of cloacogenic zone or primary cloacogenic carcinoma of anal canal or primary malignant neoplasm of anal canal or primary malignant neoplasm of cloacogenic zone.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: anus, anal cloacogenic zone or cloacogenic zone .

ICD-10:C21.2
Short Description:Malignant neoplasm of cloacogenic zone
Long Description:Malignant neoplasm of cloacogenic zone

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code C21.2 are found in the index:


Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Malignant tumor of cloacogenic zone
  • Primary cloacogenic carcinoma of anal canal
  • Primary malignant neoplasm of anal canal
  • Primary malignant neoplasm of cloacogenic zone

Diagnostic Related Groups

The ICD-10 code C21.2 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.

  • 374 - DIGESTIVE MALIGNANCY WITH MCC
  • 375 - DIGESTIVE MALIGNANCY WITH CC
  • 376 - DIGESTIVE MALIGNANCY WITHOUT CC/MCC

Convert C21.2 to ICD-9

  • 154.8 - Mal neo rectum/anus NEC (Approximate Flag)

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of digestive organs (C15-C26)
      • Malignant neoplasm of anus and anal canal (C21)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Table of Neoplasms

The code C21.2 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.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»anus, anal
  »cloacogenic zone
C21.2C78.5D01.3D12.9D37.8D49.0
»cloacogenic zone
C21.2C78.5D01.3D12.9D37.8D49.0

Information for Patients


Anal Cancer

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


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