D01.1 - Carcinoma in situ of rectosigmoid junction

Version 2023
Short Description:Carcinoma in situ of rectosigmoid junction
Long Description:Carcinoma in situ of rectosigmoid junction
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Neoplasms (C00–D48)
    • In situ neoplasms (D00-D09)
      • Carcinoma in situ of other and unspecified digestive organs (D01)

D01.1 is a billable ICD-10 code used to specify a medical diagnosis of carcinoma in situ of rectosigmoid junction. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic colon [See Also: Neoplasm, intestine, large] with rectum ; Neoplasm, neoplastic intestine, intestinal large colon and rectum ; Neoplasm, neoplastic junction pelvirectal ; Neoplasm, neoplastic junction rectosigmoid ; Neoplasm, neoplastic pelvirectal junction ; Neoplasm, neoplastic rectosigmoid (junction) ; Neoplasm, neoplastic rectum (ampulla) and colon ; etc

Approximate Synonyms

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

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
D01.1230.4 - Ca in situ rectum
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Table of Neoplasms

This code is referenced 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
CaInSitu Benign Uncertain
»Neoplasm, neoplastic
  »colon [See Also: Neoplasm, intestine, large]
    »with rectum
»Neoplasm, neoplastic
  »intestine, intestinal
        »and rectum
»Neoplasm, neoplastic
»Neoplasm, neoplastic
»Neoplasm, neoplastic
  »pelvirectal junction
»Neoplasm, neoplastic
  »rectosigmoid (junction)
»Neoplasm, neoplastic
  »rectum (ampulla)
    »and colon

Patient Education

Colorectal Cancer

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:

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

[Learn More in MedlinePlus]

Colon Cancer Summary

Learn about colon cancer risk factors, symptoms, tests to diagnose, factors affecting prognosis, staging, and treatment.
[Learn More in MedlinePlus]

Code History