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ICD-10-CM 2027 diagnosis code

K27Peptic ulcer, site unspecified

Not billable — use a more specific code

K27 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 K27

K27 is the ICD-10-CM diagnosis code for peptic ulcer, site unspecified. 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: K27.0 (hemorrhage), K27.1 (perforation), K27.2 (perforation), K27.3 (perforation), K27.4 (hemorrhage), K27.5 (perforation), K27.6 (perforation), K27.7 (perforation) and 1 more.

Don't report K27 together with the conditions in its Excludes1 note: peptic ulcer of newborn (P78.82).

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

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 K27

Coding notes

IncludesFurther defines the content of the category
  • gastroduodenal ulcer NOS
  • peptic ulcer NOS
Excludes1Not coded here — never report together with this code
  • peptic ulcer of newborn (P78.82)
Use additional codeAdd a secondary code to fully describe the condition
  • code to identify:
  • alcohol abuse and dependence (F10.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to K27.

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 K27

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 K27

Is K27 billable?

No. K27 is a header code. Report one of its more specific subcodes instead.