Decoding Gastric Cancer: Navigating ICD-10 Codes For Diagnosis And Treatment

What is Gastric Cancer?

Gastric cancer, also known as stomach cancer, is a type of cancer that starts in the cells of the stomach. It is a relatively common type of cancer, with about 27,600 new cases diagnosed each year in the United States alone. Gastric cancer can be classified into different types based on the type of cells that are affected, such as adenocarcinoma, lymphoma, or gastrointestinal stromal tumors.

Code Information

ICD--CM Diagnosis Code C
ICD–CM Diagnosis Code C

The ICD-10 code for gastric cancer is C16.9. This code is used to classify and code diagnoses of gastric cancer in medical records. It is important for accurate and consistent coding to ensure proper treatment and reimbursement for patients with gastric cancer.

Diagnostic Related Groups (MS-DRG)

Gastric Cancer ICD  Code  Power
Gastric Cancer ICD Code Power

Gastric cancer is typically classified into MS-DRG 151 – Stomach, Esophageal, and Duodenal Procedures, with Major Complications or Comorbidities. This DRG includes cases where patients undergo procedures for gastric cancer treatment and have additional complications or comorbidities that affect their care and outcomes.

Convert to ICD-9 Code

To convert the ICD-10 code for gastric cancer (C16.9) to an ICD-9 code, you would use code 151.9. This code corresponds to malignant neoplasm of stomach, unspecified site, in the ICD-9 coding system.

Code History

The ICD-10 code for gastric cancer, C16.9, was introduced in 2015 as part of the transition from the ICD-9 to ICD-10 coding system. This change was made to provide more specific and detailed codes for different types of cancer, including gastric cancer, to improve accuracy and consistency in healthcare coding and billing.

Approximate Synonyms

Some approximate synonyms for gastric cancer include stomach cancer, gastric carcinoma, and malignant neoplasm of the stomach. These terms are used interchangeably to describe the same type of cancer that originates in the cells of the stomach.

Clinical Information

Gastric cancer typically develops over many years, starting as a small lesion or ulcer in the lining of the stomach. As the cancer grows and spreads, it can cause symptoms such as abdominal pain, bloating, nausea, vomiting, weight loss, and difficulty swallowing. If left untreated, gastric cancer can spread to nearby organs and lymph nodes, leading to more advanced stages of the disease.


The exact cause of gastric cancer is not fully understood, but several risk factors have been identified that may increase the likelihood of developing the disease. These risk factors include age, gender (men are more likely to develop gastric cancer), family history of gastric cancer, smoking, obesity, a diet high in smoked, pickled, or salty foods, and infection with the bacterium Helicobacter pylori.


Common symptoms of gastric cancer include persistent abdominal pain or discomfort, unintentional weight loss, loss of appetite, difficulty swallowing, nausea and vomiting, bloating after meals, feeling full quickly while eating, and fatigue. It is important to consult a healthcare provider if you experience any of these symptoms, as early detection and treatment can improve outcomes for patients with gastric cancer.


Diagnosing gastric cancer usually involves a combination of physical exams, imaging tests such as endoscopy or CT scans, and biopsy of suspicious tissue. Blood tests may also be used to detect certain markers that are associated with gastric cancer. Once a diagnosis is confirmed, staging tests may be performed to determine the extent of the cancer and guide treatment decisions.


Treatment for gastric cancer depends on the stage of the disease and may include surgery to remove the cancerous tissue, chemotherapy, radiation therapy, targeted therapy, and immunotherapy. In some cases, a combination of these treatments may be used to achieve the best possible outcome for patients with gastric cancer. Palliative care may also be recommended to manage symptoms and improve quality of life for patients with advanced gastric cancer.


In conclusion, gastric cancer is a type of cancer that starts in the cells of the stomach and can cause a variety of symptoms that should not be ignored. Early detection and treatment are key to improving outcomes for patients with gastric cancer. Proper coding and classification of gastric cancer using the ICD-10 code C16.9 is essential for accurate medical records and billing. By understanding the

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