Valid for Submission
C20 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of rectum. The code C20 is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.
The ICD-10-CM code C20 might also be used to specify conditions or terms like adenocarcinoma of rectum, anorectal adenocarcinoma, carcinoma of upper rectum, local recurrence of malignant tumor of rectum, malignant melanoma of rectum , malignant tumor of rectum, etc.
The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: rectum (ampulla) .
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code C20:
Inclusion TermsInclusion Terms
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 rectal ampulla
Type 1 ExcludesType 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- malignant carcinoid tumor of the rectum C7A.026
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Adenocarcinoma of rectum
- Anorectal adenocarcinoma
- Carcinoma of upper rectum
- Local recurrence of malignant tumor of rectum
- Malignant melanoma of rectum
- Malignant tumor of rectum
- Metastasis from malignant tumor of rectum
- Overlapping malignant neoplasm of colon
- Overlapping malignant neoplasm of colon and rectum
- pN1: Metastasis in 1 to 3 regional lymph nodes
- pN2: Metastasis in 4 or more regional lymph nodes
- Primary malignant neoplasm of rectum
- pT1: Tumor invades submucosa
- pT2: Tumor invades muscularis propria
- pT3: Tumor invades through the muscularis propria into the subserosa or into non-peritonealized pericolic or perirectal tissues
- pT3a,b category
- pT3a,b: Tumor invades through the muscularis propria into the subserosa or into non-peritonealized pericolic or perirectal tissues, invades 5 mm or less beyond the border of the muscularis propria
- pT3c,d category
- pT3c,d: Tumor invades through the muscularis propria into the subserosa or into non-peritonealized pericolic or perirectal tissues, invades greater than 5 mm beyond the border of the muscularis propria
- pT4: Tumor directly invades other organs or structures and/or perforates visceral peritoneum
- Squamous cell carcinoma of rectum
- T1: Tumor invades submucosa
- T3: Colon/rectum tumor invades through the muscularis propria into the subserosa or the nonperitonealized pericolic or perirectal soft tissues
- T3c,d: Colon/rectum tumor invades >5 mm beyond the border of the muscularis propria
- T4a: Colon/rectum tumor directly invades other organs or structures
- T4b: Colon/rectum tumor penetrates the visceral peritoneum
Diagnostic Related Groups - MS-DRG Mapping
|MS-DRG||MS-DRG Title||MCD||Relative Weight|
|374||DIGESTIVE MALIGNANCY WITH MCC||06||2.0679|
|375||DIGESTIVE MALIGNANCY WITH CC||06||1.2049|
|376||DIGESTIVE MALIGNANCY WITHOUT CC/MCC||06||0.8952|
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.
Convert C20 to ICD-9 Code
Table of Neoplasms
The code C20 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.
Information for Patients
The colon and rectum are part of the large intestine. Colorectal cancer occurs when tumors form in the lining of the large intestine. It is common in both men and women. The risk of developing colorectal cancer rises after age 50. You're also more likely to get it if you have colorectal polyps, a family history of colorectal cancer, ulcerative colitis or Crohn's disease, eat a diet high in fat, or smoke.
Symptoms of colorectal cancer include
- Diarrhea or constipation
- A feeling that your bowel does not empty completely
- Blood (either bright red or very dark) in your stool
- Stools that are narrower than usual
- Frequent gas pains or cramps, or feeling full or bloated
- Weight loss with no known reason
- Nausea or vomiting
Because you may not have symptoms at first, it's important to have screening tests. Everyone over 50 should get screened. Tests include colonoscopy and tests for blood in the stool. Treatments for colorectal cancer include surgery, chemotherapy, radiation, or a combination. Surgery can usually cure it when it is found early.
NIH: National Cancer Institute
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