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ICD-10-CM 2027 diagnosis code

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

✓ Billable / specific

K28.9 is a valid, billable ICD-10-CM code for gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Gastrojejunal ulcer, unsp as acute or chr, w/o hemor or perf

Looking up by condition? See ICD-10 code for Gastrojejunal peptic ulcer.

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 K28.9

K28.9 is the ICD-10-CM diagnosis code for gastrojejunal ulcer, unspecified as acute or chronic, without hemorrhage or perforation. It belongs to category K28 (gastrojejunal ulcer), block K20-K31 (diseases of esophagus, stomach and duodenum) and chapter 11 (diseases of the digestive system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within K28, choose K28.9 (unspecified as acute or chronic, without hemorrhage or perforation) only when documentation doesn't support a more specific option: acute gastrojejunal ulcer with hemorrhage (K28.0), acute gastrojejunal ulcer with perforation (K28.1), acute gastrojejunal ulcer with both hemorrhage and perforation (K28.2), acute gastrojejunal ulcer without hemorrhage or perforation (K28.3), chronic or unspecified gastrojejunal ulcer with hemorrhage (K28.4), chronic or unspecified gastrojejunal ulcer with perforation (K28.5), chronic or unspecified gastrojejunal ulcer with both hemorrhage and perforation (K28.6) and chronic gastrojejunal ulcer without hemorrhage or perforation (K28.7).

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

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 380 (Complicated Peptic Ulcer with MCC, relative weight 1.9245), DRG 381 (Complicated Peptic Ulcer with CC, relative weight 1.0838) and DRG 382 (Complicated Peptic Ulcer without CC/MCC, relative weight 0.7281), in MDC 06 (Diseases and Disorders of the Digestive System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 534.90 (gastrojejunal ulcer, unspecified as acute or chronic, without mention of hemorrhage or perforation, without mention of obstruction).

Notes that apply from higher levels

Instructions written at a parent level also apply to K28.9.

› From K28 Gastrojejunal ulcer
Includes
  • 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
  • primary ulcer of small intestine (K63.3)
Use additional code
  • code to identify:
  • alcohol abuse and dependence (F10.-)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to K28.9.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 534.90Gastrojejunal ulcer, unspecified as acute or chronic, without mention of hemorrhage or perforation, without mention of obstructionapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about K28.9

Is K28.9 billable?

Yes. K28.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K28.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K28.9 as a principal diagnosis.

Is K28.9 a CC or MCC?

No. K28.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K28.9 group to?

K28.9 is used in the MS-DRG v44.0 logic for MS-DRG 380 (Complicated Peptic Ulcer with MCC), MS-DRG 381 (Complicated Peptic Ulcer with CC) and MS-DRG 382 (Complicated Peptic Ulcer without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for K28.9?

The CMS General Equivalence Mappings map K28.9 to ICD-9-CM 534.90.