ICD-10-CM 2027 diagnosis code

C16Malignant neoplasm of stomach

Not billable — use a more specific code

C16 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About C16

C16 is the ICD-10-CM diagnosis code for malignant neoplasm of stomach. It belongs to block C15-C26 (malignant neoplasms of digestive organs) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: C16.0 (cardia), C16.1 (stomach), C16.2 (stomach), C16.3 (antrum), C16.4 (pylorus), C16.5 (unspecified), C16.6 (unspecified), C16.8 (stomach) and 1 more.

The conditions in its Excludes2 note aren't part of C16, but may be coded alongside it if the patient has both: malignant carcinoid tumor of the stomach (C7A.092).

Use an additional code to identify: alcohol abuse and dependence (F10.-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under C16

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

malignant carcinoid tumor of the stomach (C7A.092)

Use additional codeAdd a secondary code to fully describe the condition

code to identify:
alcohol abuse and dependence (F10.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to C16.

Broader instructions also apply from C15-C26 Malignant neoplasms of digestive organs and Chapter 2: Neoplasms.

Code history

2016
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2021
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2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about C16

Is C16 billable?: No. C16 is a header code. Report one of its more specific subcodes instead.