ICD-10 Diagnosis Code C16.9

Malignant neoplasm of stomach, unspecified

Diagnosis Code C16.9

ICD-10: C16.9
Short Description: Malignant neoplasm of stomach, unspecified
Long Description: Malignant neoplasm of stomach, unspecified
This is the 2017 version of the ICD-10-CM diagnosis code C16.9

Valid for Submission
The code C16.9 is valid for submission for HIPAA-covered transactions.

Replaced Code Additional informationCallout TooltipReplaced Code
The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2016. This codes was replaced for the FY 2017 (October 1, 2016-September 30, 2017).

This code was replaced in the 2017 ICD-10 code set with the code(s) listed below.
  • C49.A2 - Gastrointestinal stromal tumor of stomach

Code Classification
  • Neoplasms (C00–D48)
    • Malignant neoplasms of digestive organs (C15-C26)
      • Malignant neoplasm of stomach (C16)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code C16.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V34.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 151.9 - Malig neopl stomach NOS

  • Adenocarcinoma of stomach
  • Carcinoma of stomach
  • Early gastric cancer
  • Gastroduodenal disorder
  • Late gastric cancer
  • Local recurrence of malignant tumor of stomach
  • Malignant tumor of esophagus, stomach and duodenum
  • Malignant tumor of stomach
  • Metastasis from malignant tumor of stomach
  • Primary malignant neoplasm of stomach

Index of Diseases and Injuries
References found for the code C16.9 in the Index of Diseases and Injuries:

Information for Patients

Stomach Cancer

Also called: Gastric 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

  • Abdominal radiation - discharge
  • After chemotherapy - discharge
  • Gastrectomy
  • Radiation enteritis
  • Stomach cancer
  • Understanding Chemotherapy - NIH - Easy-to-Read (National Cancer Institute)
  • What to Know about External Beam Radiation Therapy - NIH - Easy-to-Read (National Cancer Institute)

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