2024 ICD-10-CM Diagnosis Code C16.9

Approximate Synonyms

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

• Adenocarcinoma of stomach
• Carcinoma of stomach
• Diffusely infiltrative tumor configuration
• Early gastric cancer
• Epstein-Barr virus associated gastric carcinoma
• Gastric adenocarcinoma and proximal polyposis of stomach
• Gastric polyp
• Gastric polyposis
• Gastroduodenal disorder
• HER2-positive gastric cancer
• Hereditary diffuse carcinoma of stomach
• Late gastric cancer
• Leiomyosarcoma of stomach
• Linitis plastica of stomach
• Local recurrence of malignant tumor of stomach
• Malignant tumor of esophagus, stomach and duodenum
• Malignant tumor of stomach
• Metastatic gastroesophageal adenocarcinoma
• Primary carcinoma of stomach
• Primary HER2-positive gastric cancer
• Primary malignant mesenchymal neoplasm of stomach
• Primary malignant neoplasm of stomach
• Squamous cell carcinoma of stomach
• Undifferentiated carcinoma of stomach

Clinical Information

• Bariatric Surgery

  surgical procedures aimed at affecting metabolism and producing major weight reduction in patients with morbid obesity.

• Diverticulosis, Stomach

  a pathological condition characterized by the presence of a number of gastric diverticula in the stomach.

• Diverticulum, Stomach

  saccular, outward protrusion of all or a portion of the wall of the stomach.

• Gastric Absorption

  uptake of substances via the stomach.

• Gastric Antral Vascular Ectasia

  a distinct vascular lesion in the pyloric antrum that is characterized by tortuous dilated blood vessels (ectasia) radiating outward from the pylorus. the vessel pattern resembles the stripes on the surface of a watermelon. this lesion causes both acute and chronic gastrointestinal hemorrhage.

• Gastric Dilatation

  abnormal distention of the stomach due to accumulation of gastric contents that may reach 10 to 15 liters. gastric dilatation may be the result of gastric outlet obstruction; ileus; gastroparesis; or denervation.

• Gastric Fistula

  abnormal passage communicating with the stomach.

• Gastric Stump

  that portion of the stomach remaining after gastric surgery, usually gastrectomy or gastroenterostomy for cancer of the stomach or peptic ulcer. it is a common site of cancer referred to as stump cancer or carcinoma of the gastric stump.

• Gastrointestinal Contents

  the contents included in all or any segment of the gastrointestinal tract.

• Receptor-Like Protein Tyrosine Phosphatases, Class 3

  a subclass of receptor-like protein tryosine phosphatases that contain a single cytosolic protein tyrosine phosphate domain and multiple extracellular fibronectin iii-like domains.

• Stomach

  an organ of digestion situated in the left upper quadrant of the abdomen between the termination of the esophagus and the beginning of the duodenum.

• Stomach Diseases

  pathological processes involving the stomach.

• Stomach Neoplasms

  tumors or cancer of the stomach.

• Stomach Rupture

  bursting of the stomach.

• Stomach Ulcer

  ulceration of the gastric mucosa due to contact with gastric juice. it is often associated with helicobacter pylori infection or consumption of nonsteroidal anti-inflammatory drugs (nsaids).

• Stomach Volvulus

  twisting of the stomach that may result in gastric ischemia and gastric outlet obstruction. it is often associated with diaphragmatic hernia.

• Stomach, Avian

  a component of the digestive system of birds which consists of the gizzard and proventriculus.

• Stomach, Ruminant

  a component of the digestive system of ruminants which consists of the abomasum; omasum; reticulum; and rumen.

C16.9 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
374	DIGESTIVE MALIGNANCY WITH MCC	06	2.099
375	DIGESTIVE MALIGNANCY WITH CC	06	1.1983
376	DIGESTIVE MALIGNANCY WITHOUT CC/MCC	06	0.8914

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 C16.9 to ICD-9-CM

• ICD-9-CM Code: 151.9 - Malig neopl stomach NOS

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.

Filter table of neoplasms:

Neoplasm, neoplastic	Malignant Primary	Malignant Secondary	CaInSitu	Benign	Uncertain Behavior	Unspecified Behavior
»Neoplasm, neoplastic   »stomach	C16.9	C78.89	D00.2	D13.1	D37.1	D49.0
»Neoplasm, neoplastic   »stomach     »wall NEC	C16.9	C78.89	D00.2	D13.1	D37.1	D49.0

Patient Education

Stomach Cancer

The stomach is an organ between the esophagus and the small intestine. It mixes food with stomach acid and helps digest protein. Stomach cancer mostly affects older people - two-thirds of people who have it are over age 65. Your risk of getting it is also higher if you:

• Have had a Helicobacter pylori infection
• Have had stomach inflammation
• Are a man
• Eat lots of salted, smoked, or pickled foods
• Smoke cigarettes
• Have a family history of stomach cancer

It is hard to diagnose stomach cancer in its early stages. Indigestion and stomach discomfort can be symptoms of early cancer, but other problems can cause the same symptoms. In advanced cases, there may be blood in your stool, vomiting, unexplained weight loss, jaundice, or trouble swallowing. Doctors diagnose stomach cancer with a physical exam, blood and imaging tests, an endoscopy, and a biopsy.

Because it is often found late, it can be hard to treat stomach cancer. Treatment options include surgery, chemotherapy, radiation or a combination.

NIH: National Cancer Institute

[Learn More in MedlinePlus]

What is Stomach Cancer?

Learn about stomach cancer risk factors, symptoms, tests to diagnose, factors affecting prognosis, staging, treatment, and coping.
[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.