ICD-10 Diagnosis Code C16.9

• 374 - DIGESTIVE MALIGNANCY WITH MCC
• 375 - DIGESTIVE MALIGNANCY WITH CC
• 376 - DIGESTIVE MALIGNANCY WITHOUT CC/MCC

• 151.9 - Malig neopl stomach NOS

• Adenocarcinoma of stomach
• Carcinoma of stomach
• Diffusely infiltrative tumor configuration
• Early gastric cancer
• Epstein-Barr virus associated gastric carcinoma
• Gastroduodenal disorder
• 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
• Metastasis from malignant tumor of stomach
• pN1: Metastasis in 1 to 6 regional
• pN2: Metastasis in 7 to 15 regional
• pN3: Metastasis in more than 15 regional
• Primary malignant mesenchymal neoplasm of stomach
• Primary malignant neoplasm of stomach
• pT1: Tumor invades lamina propria or submucosa
• pT1a: Tumor invades lamina propria
• pT1b: Tumor invades submucosa
• pT2: Tumor invades muscularis propria or subserosa
• pT2a: Tumor invades muscularis propria
• pT2b: Tumor invades subserosa
• pT3: Tumor penetrates serosa
• pT4: Tumor invades adjacent structures
• T1a: Esophagus/stomach tumor invades lamina propria
• T1b: Esophagus/stomach tumor invades submucosa
• T2: Stomach tumor invades muscularis propria or subserosa
• T2a: Stomach tumor invades muscularis propria
• T2b: Stomach tumor invades subserosa
• T3: Stomach tumor penetrates serosa without invasion of adjacent structures

• Inclusion Terms:
  • Gastric cancer NOS

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

General Equivalence Map Definitions
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.

• Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
• No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
• Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

• And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
• Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
• Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
• Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
• Type 2 Excludes Notes - 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.
• Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
• Inclusion terms - List of terms is included under some codes. These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
• NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
• NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
• See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
• See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
• 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
• With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.