ICD-10-CM 2027 diagnosis code

K29Gastritis and duodenitis

Not billable — use a more specific code

K29 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 K29

K29 is the ICD-10-CM diagnosis code for gastritis and duodenitis. It belongs to block K20-K31 (diseases of esophagus, stomach and duodenum) and chapter 11 (diseases of the digestive system). 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: K29.0 (gastritis), K29.2 (gastritis), K29.3 (gastritis), K29.4 (gastritis), K29.5 (gastritis), K29.6 (gastritis), K29.7 (unspecified), K29.8 (duodenitis) and 1 more.

Don't report K29 together with the conditions in its Excludes1 note: eosinophilic gastritis or gastroenteritis (K52.81) and Zollinger-Ellison syndrome (E16.4).

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 K29

Coding notes

Excludes1Not coded here — never report together with this code

eosinophilic gastritis or gastroenteritis (K52.81)
Zollinger-Ellison syndrome (E16.4)

Notes that apply from higher levels

Instructions written at a parent level also apply to K29.

Broader instructions also apply from K20-K31 Diseases of esophagus, stomach and duodenum and Chapter 11: Diseases of the digestive system.

Codes whose notes reference K29

K92.2Excludes1

Code history

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2027

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

Common questions about K29

Is K29 billable?: No. K29 is a header code. Report one of its more specific subcodes instead.