2021 ICD-10-CM Code C78.6

Secondary malignant neoplasm of retroperitoneum and peritoneum

Version 2021

Valid for Submission

ICD-10:C78.6
Short Description:Secondary malignant neoplasm of retroperiton and peritoneum
Long Description:Secondary malignant neoplasm of retroperitoneum and peritoneum

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
      • Secondary malignant neoplasm of resp and digestive organs (C78)

C78.6 is a billable diagnosis code used to specify a medical diagnosis of secondary malignant neoplasm of retroperitoneum and peritoneum. The code C78.6 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.

The ICD-10-CM code C78.6 might also be used to specify conditions or terms like carcinomatosis of peritoneal cavity, gallbladder tnm finding, invasion of neoplasm to visceral peritoneum, malignant neoplasm of connective and soft tissue of abdominal wall, malignant neoplasm of mesentery , malignant neoplasm of mesentery, etc.

The following anatomical sites found in the Table of Neoplasms apply to this code given the correct histological behavior: Neoplasm, neoplastic cavity peritoneal ; Neoplasm, neoplastic connective tissue NEC retroperitoneum ; Neoplasm, neoplastic cul-de-sac (Douglas') ; Neoplasm, neoplastic Douglas' cul-de-sac or pouch ; Neoplasm, neoplastic mesentery, mesenteric ; Neoplasm, neoplastic mesoappendix ; Neoplasm, neoplastic mesocolon ; etc

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 C78.6 are found in the index:

Approximate Synonyms

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

Convert C78.6 to ICD-9 Code

Table of Neoplasms

The code C78.6 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
»Neoplasm, neoplastic
  »cavity
    »peritoneal
C48.2C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »connective tissue NEC
    »retroperitoneum
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »cul-de-sac (Douglas')
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »Douglas' cul-de-sac or pouch
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »mesentery, mesenteric
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »mesoappendix
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »mesocolon
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »omentum
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »paranephric
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »periadrenal (tissue)
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »perinephric
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »peripancreatic
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »perirenal (tissue)
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
C48.2C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
    »parietal
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
    »pelvic
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »peritoneum, peritoneal (cavity)
    »specified part NEC
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »rectouterine pouch
C48.1C78.6D20.1D48.4D49.0
»Neoplasm, neoplastic
  »retrocecal
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »retroperitoneal (space) (tissue)
C48.0C78.6D20.0D48.3D49.0
»Neoplasm, neoplastic
  »retroperitoneum
C48.0C78.6D20.0D48.3D49.0

Information for Patients


Cancer

Also called: Carcinoma, Malignancy, Neoplasms, Tumor

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

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

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 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 (First year ICD-10-CM implemented into the HIPAA code set)