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ICD-10-CM 2027 diagnosis code

K25.9Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation

✓ Billable / specific

K25.9 is a valid, billable ICD-10-CM code for gastric 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: Gastric ulcer, unsp as acute or chronic, w/o hemor or perf

Looking up by condition? See ICD-10 code for Stomach 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 K25.9

K25.9 is the ICD-10-CM diagnosis code for gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation. It belongs to category K25 (gastric 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 K25, choose K25.9 (unspecified as acute or chronic, without hemorrhage or perforation) only when documentation doesn't support a more specific option: acute gastric ulcer with hemorrhage (K25.0), acute gastric ulcer with perforation (K25.1), acute gastric ulcer with both hemorrhage and perforation (K25.2), acute gastric ulcer without hemorrhage or perforation (K25.3), chronic or unspecified gastric ulcer with hemorrhage (K25.4), chronic or unspecified gastric ulcer with perforation (K25.5), chronic or unspecified gastric ulcer with both hemorrhage and perforation (K25.6) and chronic gastric ulcer without hemorrhage or perforation (K25.7).

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), DRG 382 (Complicated Peptic Ulcer without CC/MCC, relative weight 0.7281), DRG 383 (Uncomplicated Peptic Ulcer with MCC, relative weight 1.3536) and DRG 384 (Uncomplicated Peptic Ulcer without MCC, relative weight 0.8469), 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 531.90 (gastric 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 K25.9.

› From K25 Gastric ulcer
Includes
  • erosion (acute) of stomach
  • pylorus ulcer (peptic)
  • stomach ulcer (peptic)
Excludes1
  • acute gastritis (K29.0-)
  • peptic ulcer NOS (K27.-)
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 K25.9.

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 →
  • 531.90Gastric 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 K25.9

Is K25.9 billable?

Yes. K25.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can K25.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict K25.9 as a principal diagnosis.

Is K25.9 a CC or MCC?

No. K25.9 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does K25.9 group to?

K25.9 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), MS-DRG 382 (Complicated Peptic Ulcer without CC/MCC), MS-DRG 383 (Uncomplicated Peptic Ulcer with MCC) and MS-DRG 384 (Uncomplicated Peptic Ulcer without 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 K25.9?

The CMS General Equivalence Mappings map K25.9 to ICD-9-CM 531.90.