2027 ICD-10-CM Diagnosis Code K28Gastrojejunal ulcer

ICD-10-CM Codes›K00–K95›K20-K31›K28

ICD-10-CM K28
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K28 is a non-billable ICD-10-CM category code for gastrojejunal ulcer, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K28.0, K28.1, K28.2, and K28.3.

Code Identity

ICD-10-CM Code
K28
Billable Status
No — Non-Billable Category
Code Describes
Gastrojejunal ulcer
Short Description
Gastrojejunal ulcer
Same as the full description in the CMS dataset.
Chapter
K20-K31
Diseases of esophagus, stomach and duodenum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK20-K31Diseases of esophagus, stomach and duodenum
CategoryK28Gastrojejunal ulcer
This CodeK28Gastrojejunal ulcer

Specific Coding for Gastrojejunal ulcerOverview

Non-specific codes like K28 require more characters. Use one of these billable codes instead:

  • Use K28.0 for Acute gastrojejunal ulcer with hemorrhage

  • Use K28.1 for Acute gastrojejunal ulcer with perforation

  • Use K28.2 for Acute gastrojejunal ulcer with both hemorrhage and perforation

  • Use K28.3 for Acute gastrojejunal ulcer without hemorrhage or perforation

  • Use K28.4 for Chronic or unspecified gastrojejunal ulcer with hemorrhage

  • Use K28.5 for Chronic or unspecified gastrojejunal ulcer with perforation

  • Use K28.6 for Chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation

  • Use K28.7 for Chronic gastrojejunal ulcer without hemorrhage or perforation

  • Use K28.9 for Gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K28: its own notes plus those printed at block K20-K31 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

  • anastomotic ulcer (peptic) or erosion
  • gastrocolic ulcer (peptic) or erosion
  • gastrointestinal ulcer (peptic) or erosion
  • gastrojejunal ulcer (peptic) or erosion
  • jejunal ulcer (peptic) or erosion
  • marginal ulcer (peptic) or erosion
  • stomal ulcer (peptic) or erosion

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • primary ulcer of small intestine (K63.3)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block K20-K31 Diseases of esophagus, stomach and duodenum applies to 106 codes
From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

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

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K28, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming K28: they are not reported together with it, unless the two conditions are unrelated.

  • K63.3 Ulcer of intestine
    gastrointestinal ulcer (K28.-)
  • K63.3 Ulcer of intestine
    gastrojejunal ulcer (K28.-)
  • K63.3 Ulcer of intestine
    jejunal ulcer (K28.-)
  • K92.2 Gastrointestinal hemorrhage, unspecified
    peptic ulcer with hemorrhage (K25-K28) names K25-K28, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming K28: its condition is not part of those codes, and both may be reported when the patient has both.

  • K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
    gastrojejunal ulcer (K28.-)

Patient EducationClinical

Peptic Ulcer

A peptic ulcer is a sore in the lining of your stomach or your duodenum, the first part of your small intestine. A burning stomach pain is the most common symptom. The pain:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K28Overview

What is the ICD-10 code for gastrojejunal ulcer?

K28 is the ICD-10-CM category for gastrojejunal ulcer, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is K28 (Gastrojejunal ulcer) a billable code?

No. This is a category header that groups the codes for gastrojejunal ulcer, and headers cannot be submitted on claims. Claims for gastrojejunal ulcer need a more specific code from this category, such as K28.0, K28.1, and K28.2.

Can K28 be reported with K63.3?

Not as a rule. The Excludes1 note on K28 lists "primary ulcer of small intestine (K63.3)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does K28 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code to identify: alcohol abuse and dependence (F10.-). The additional code is reported after K28.