2024 ICD-10-CM Diagnosis Code D12.6

Benign neoplasm of colon, unspecified

ICD-10-CM Code:
ICD-10 Code for:
Benign neoplasm of colon, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Neoplasms
    • Benign neoplasms, except benign neuroendocrine tumors
      • Benign neoplasm of colon, rectum, anus and anal canal

D12.6 is a billable diagnosis code used to specify a medical diagnosis of benign neoplasm of colon, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic intestine, intestinal large or Neoplasm, neoplastic intestine, intestinal large colon .

Unspecified diagnosis codes like D12.6 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Adenoma of large intestine
  • Adenomatous polyp of colon
  • Attenuated familial adenomatous polyposis
  • Benign epithelial neoplasm of large intestine
  • Benign gastrointestinal stromal neoplasm of large intestine
  • Benign lymphoid polyposis of intestine
  • Benign mesenchymoma of large intestine
  • Benign neoplasm of colon
  • Benign neoplasm of large intestine
  • Benign polyp of colon
  • Benign polyp of colon
  • Benign stromal neoplasm of gastrointestinal tract
  • Benign tubular adenoma of large intestine
  • Cap polyposis
  • Dysplasia of colon
  • Dysplasia of large intestine
  • Familial adenomatous polyposis due to 5q22.2 microdeletion
  • Familial multiple polyposis syndrome
  • Familial multiple polyposis syndrome
  • Gardner syndrome
  • Gastrointestinal stromal tumor of large intestine
  • Hamartoma of intestine
  • Hereditary mixed polyposis syndrome
  • Inflammatory polyposis of intestine
  • Intestinal polyposis syndrome
  • Leiomyoma of large intestine
  • Low grade glandular intraepithelial neoplasia of large intestine
  • Malignant neoplasm of intestine due to familial adenomatous polyposis
  • Metaplastic polyposis of intestine
  • Mild dysplasia of colon
  • Moderate dysplasia of colon
  • MYH-associated polyposis
  • Nonfamilial multiple polyposis syndrome
  • Pseudoinvasion in adenomatous polyp of large intestine
  • Pseudopolyposis of colon
  • Serrated polyp of colon
  • Sessile serrated polyp of colon
  • Severe dysplasia of colon
  • Tubular adenoma
  • Tubular adenoma
  • Tubular adenoma of colon
  • Turcot syndrome
  • Villous adenoma of colon

Clinical Classification

Clinical Information

  • Gardner Syndrome

    a variant of adenomatous polyposis coli caused by mutation in the apc gene (genes, apc) on chromosome 5. it is characterized by not only the presence of multiple colonic polyposis but also extracolonic adenomatous polyps in the upper gastrointestinal tract; the eye; the skin; the skull; and the facial bones; as well as malignancy in organs other than the gi tract.
  • Intestinal Polyposis Syndrome

    a syndrome associated with the development of multiple polyps throughout the intestine. it includes familial adenomatous polyposis , hamartomatous polyposis syndromes, and other rare polyposis syndromes.
  • Turcot Syndrome

    an autosomal dominant hereditary neoplastic syndrome caused by mutations in the pms2, mlh1, msh2, or apc genes. there are two types described, type 1, characterized by the presence of glioblastoma and often associated with hereditary nonpolyposis colorectal carcinoma, and type 2, characterized by the presence of medulloblastoma and familiar adenomatous polyposis.
  • Turcot Syndrome Type 1

    an autosomal dominant hereditary neoplastic syndrome caused by mutations in the pms2, mlh1, or msh2 genes. it is characterized by the presence of glioblastoma and the absence of familiar adenomatous polyposis. patients often develop hereditary nonpolyposis colorectal carcinoma.
  • Turcot Syndrome Type 2

    an autosomal dominant hereditary neoplastic syndrome caused by mutations in the apc gene. it is characterized by the presence of medulloblastoma and familiar adenomatous polyposis.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert D12.6 to ICD-9-CM

  • ICD-9-CM Code: 211.3 - Benign neoplasm lg bowel
    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
  »intestine, intestinal
»Neoplasm, neoplastic
  »intestine, intestinal

Patient Education

Benign Tumors

Tumors are abnormal growths in your body. They can be either benign or malignant. Benign tumors aren't cancer. Malignant ones are. Benign tumors grow only in one place. They cannot spread or invade other parts of your body. Even so, they can be dangerous if they press on vital organs, such as your brain.

Tumors are made up of extra cells. Normally, cells grow and divide to form new cells as your body needs them. When cells grow old, they die, and new cells take their place. Sometimes, this process goes wrong. New cells form when your body does not need them, and old cells do not die when they should. These extra cells can divide without stopping and may form tumor.

Treatment often involves surgery. Benign tumors usually don't grow back.

NIH: National Cancer Institute

[Learn More in MedlinePlus]

Colonic Diseases

Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:

  • Colorectal cancer
  • Colonic polyps - extra tissue growing in the colon that can become cancerous
  • Ulcerative colitis - ulcers of the colon and rectum
  • Diverticulitis - inflammation or infection of pouches in the colon
  • Irritable bowel syndrome - an uncomfortable condition causing abdominal cramping and other symptoms

Treatment for colonic diseases varies greatly depending on the disease and its severity. Treatment may involve diet, medicines and in some cases, surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

[Learn More in MedlinePlus]

Juvenile polyposis syndrome

Juvenile polyposis syndrome is a disorder characterized by multiple noncancerous (benign) growths called juvenile polyps. People with juvenile polyposis syndrome typically develop polyps before age 20; however, in the name of this condition "juvenile" refers to the characteristics of the tissues that make up the polyp, not the age of the affected individual. These growths occur in the gastrointestinal tract, typically in the large intestine (colon). The number of polyps varies from only a few to hundreds, even among affected members of the same family. Polyps may cause gastrointestinal bleeding, a shortage of red blood cells (anemia), abdominal pain, and diarrhea. Approximately 15 percent of people with juvenile polyposis syndrome have other abnormalities, such as a twisting of the intestines (intestinal malrotation), heart or brain abnormalities, an opening in the roof of the mouth (cleft palate), extra fingers or toes (polydactyly), and abnormalities of the genitalia or urinary tract.

Juvenile polyposis syndrome is diagnosed when a person has any one of the following: (1) more than five juvenile polyps of the colon or rectum; (2) juvenile polyps in other parts of the gastrointestinal tract; or (3) any number of juvenile polyps and one or more affected family members. Single juvenile polyps are relatively common in children and are not characteristic of juvenile polyposis syndrome.

Three types of juvenile polyposis syndrome have been described, based on the signs and symptoms of the disorder. Juvenile polyposis of infancy is characterized by polyps that occur throughout the gastrointestinal tract during infancy. Juvenile polyposis of infancy is the most severe form of the disorder and is associated with the poorest outcome. Children with this type may develop a condition called protein-losing enteropathy. This condition results in severe diarrhea, failure to gain weight and grow at the expected rate (failure to thrive), and general wasting and weight loss (cachexia). Another type called generalized juvenile polyposis is diagnosed when polyps develop throughout the gastrointestinal tract. In the third type, known as juvenile polyposis coli, affected individuals develop polyps only in their colon. People with generalized juvenile polyposis and juvenile polyposis coli typically develop polyps during childhood.

Most juvenile polyps are benign, but there is a chance that polyps can become cancerous (malignant). It is estimated that people with juvenile polyposis syndrome have a 10 to 50 percent risk of developing a cancer of the gastrointestinal tract. The most common type of cancer seen in people with juvenile polyposis syndrome is colorectal cancer.

[Learn More in MedlinePlus]

Colon Polyps

Colon polyps are common in American adults. Learn the symptoms and causes of colon polyps, and how doctors diagnose and treat them.
[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.