Is ICD-10-CM code K29 billable?

No, K29 (Gastritis and duodenitis) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code K29 belong to?

K29 belongs to Chapter 11 of the ICD-10-CM tabular list: K00–K95 (Diseases of the Digestive System).

K29Not billable, use a more specific code below

Gastritis and duodenitis

In Diseases of esophagus, stomach and duodenum (K20-K31), chapter 11: Diseases of the Digestive System

18 billable codes under K29: 9 are an MCC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Excludes1: not coded here, use a different code

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

Also applies, from Diseases of esophagus, stomach and duodenum (K20-K31)

These notes sit on K20-K31 and apply to every code under it, including K29.

Excludes2: not included here, code separately if applicable

hiatus hernia (K44.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.

Read Section I.C.11 (page 58)

All codes under K29

K29 can't be used on a claim. Pick a billable code below; grey headings group them.

K29 MS-DRGs

As the principal diagnosis, the billable codes under K29 group to MS-DRG 377, 378, 379, 391, or 392 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 377 Gastrointestinal Hemorrhage with MCC (9 of 18 codes)
DRG 378 Gastrointestinal Hemorrhage with CC (9 of 18 codes)
DRG 379 Gastrointestinal Hemorrhage without CC/MCC (9 of 18 codes)
DRG 391 Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders with MCC (9 of 18 codes)
DRG 392 Esophagitis, Gastroenteritis and Miscellaneous Digestive Disorders without MCC (9 of 18 codes)

Other codes that refer to K29

Notes on these codes point to K29.

K92.2 Excludes1: gastritis and duodenitis with hemorrhage (K29.-)
T36-T50 Code First: aspirin gastritis (K29.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Stomach Disorders

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.