2024 ICD-10-CM Diagnosis Code D20.1

Benign neoplasm of soft tissue of peritoneum

ICD-10-CM Code:
ICD-10 Code for:
Benign neoplasm of soft tissue of peritoneum
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 soft tissue of retroperitoneum and peritoneum

D20.1 is a billable diagnosis code used to specify a medical diagnosis of benign neoplasm of soft tissue of peritoneum. 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 cavity peritoneal ; Neoplasm, neoplastic cul-de-sac (Douglas') ; Neoplasm, neoplastic Douglas' cul-de-sac or pouch ; Neoplasm, neoplastic mesentery, mesenteric ; Neoplasm, neoplastic mesoappendix ; Neoplasm, neoplastic mesocolon ; Neoplasm, neoplastic omentum ; etc

Approximate Synonyms

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

  • Benign fibrohistiocytic neoplasm of peritoneum
  • Benign neoplasm of mesocolon
  • Benign neoplasm of mesorectum
  • Benign neoplasm of omentum
  • Benign neoplasm of parietal peritoneum
  • Benign neoplasm of pelvic peritoneum
  • Benign neoplasm of peritoneum and retroperitoneum
  • Benign neoplasm of rectouterine pouch
  • Benign neoplasm of the mesentery
  • Benign neoplasm of the peritoneum
  • Neoplasm of omentum
  • Neoplasm of rectouterine pouch
  • Neoplasm of the mesocolon
  • Tumor of peritoneum and retroperitoneum

Clinical Classification

Clinical Information

  • Mesocolon

    the fold of peritoneum by which the colon is attached to the posterior abdominal wall.
  • Omentum

    a double-layered fold of peritoneum that attaches the stomach to other organs in the abdominal cavity.

Convert D20.1 to ICD-9-CM

  • ICD-9-CM Code: 211.8 - Ben neo peritoneum
    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
C48.2C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »cul-de-sac (Douglas')
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »Douglas' cul-de-sac or pouch
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »mesentery, mesenteric
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
C48.2C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
    »specified part NEC
C48.1C78.6 D20.1D48.4D49.0
»Neoplasm, neoplastic
  »rectouterine pouch
C48.1C78.6 D20.1D48.4D49.0

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]

Peritoneal Disorders

Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.

Disorders of the peritoneum are not common. They include:

  • Peritonitis - an inflammation of the peritoneum
  • Cancer
  • Complications from peritoneal dialysis

Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.

[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.