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  2. ICD-10-CM Codes List
  3. C00–D49
  4. C15-C26
  5. Malignant neoplasm of stomach (C16)

Malignant neoplasm of stomach (C16)

The ICD-10 code C16 and its subcategories are used specifically to classify different types of malignant neoplasms (cancers) of the stomach. These codes help identify the exact location within the stomach where the cancer originates, such as the cardia, fundus, body, pyloric antrum, pylorus, and the curvatures of the stomach.

The ICD-10 code for malignant neoplasm of stomach includes various detailed codes like C16.0, covering cancers of the cardia; also known by terms such as primary carcinoma of cardia or malignant tumor of the cardio-esophageal junction, and C16.1 through C16.6 designating malignant tumors in other stomach regions like the fundus, body, pyloric antrum, pylorus, lesser curvature, and greater curvature. These synonyms assist coders by linking common clinical names (e.g., carcinoma of fundus, lymphoma of pylorus) to the correct code. Additionally, C16.8 covers overlapping sites within the stomach, and C16.9 is used when the stomach cancer site is unspecified, encompassing various types including adenocarcinoma, squamous cell carcinoma, and HER2-positive gastric cancer. This detailed coding allows precise documentation for healthcare providers and billing purposes.

Instructional Notations

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

  • code to identify:
  • alcohol abuse and dependence F10

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • malignant carcinoid tumor of the stomach C7A.092

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

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.

Esophagogastric Junction

The area covering the terminal portion of ESOPHAGUS and the beginning of STOMACH at the cardiac orifice.

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.

Pyloric Stenosis

Narrowing of the pyloric canal with varied etiology. A common form is due to muscle hypertrophy (PYLORIC STENOSIS, HYPERTROPHIC) seen in infants.

Pylorus

The region of the STOMACH at the junction with the DUODENUM. It is marked by the thickening of circular muscle layers forming the pyloric sphincter to control the opening and closure of the lumen.

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.