2027 ICD-10-CM Diagnosis Code K27.3Acute peptic ulcer, site unspecified, without hemorrhage or perforation
ICD-10-CM Codes›K00–K95›K20-K31›K27
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K27.3 is a billable ICD-10-CM diagnosis code for acute peptic ulcer, site unspecified, without hemorrhage or perforation. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 380 through 384. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 76 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gastroduodenal ulcer.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute peptic ulcer
- Acute peptic ulcer with obstruction
- Acute peptic ulcer without hemorrhage AND without perforation
- Acute peptic ulcer without hemorrhage AND without perforation but with obstruction
- Acute peptic ulcer without hemorrhage, without perforation AND without obstruction
- Curling's ulcer of duodenum
- Curling's ulcers
- Cushing ulcer
- Cushing ulcer of duodenum
- Peptic ulcer without hemorrhage AND without perforation but with obstruction
- Peptic ulcer without hemorrhage, without perforation AND without obstruction
- Stress ulcer of duodenum
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K27.3: its own notes plus those printed at K27, 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.
- gastroduodenal ulcer NOS
- peptic ulcer NOS
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- hiatus hernia (K44.-)
- 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.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name K27.3, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming K27.3: they are not reported together with it, unless the two conditions are unrelated.
- K25 Gastric ulcerpeptic ulcer NOS (K27.-) names K27.-, which includes this code
- K26 Duodenal ulcerpeptic ulcer NOS (K27.-) names K27.-, which includes this code
- K63.3 Ulcer of intestinepeptic ulcer, site unspecified (K27.-) names K27.-, which includes this code
- K92.2 Gastrointestinal hemorrhage, unspecified
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Peptic Ulcer
ulcer that occurs in the regions of the gastrointestinal tract which come into contact with gastric juice containing pepsin and gastric acid. it occurs when there are defects in the mucosa barrier. the common forms of peptic ulcers are associated with helicobacter pylori and the consumption of nonsteroidal anti-inflammatory drugs (nsaids).
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.
Convert K27.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K27.3Overview
Is K27.3 (Peptic ulcer, site unspecified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute peptic ulcer, site unspecified, without hemorrhage or perforation on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K27.3 group to?
When acute peptic ulcer, site unspecified, without hemorrhage or perforation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 381, 380, 383, 384, 382, with relative weights from 0.7283 to 1.9243 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K27.3 a CC or MCC?
CMS lists K27.3 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 76 closely related codes in its exclusion list.
Can K27.3 be reported with P78.82?
Not as a rule. The Excludes1 note at K27, which applies to K27.3, lists "peptic ulcer of newborn (P78.82)". 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).
