MS-DRG · FY 2026 v43.0

MS-DRG 384 – Uncomplicated Peptic Ulcer without MCC

A Medical DRG in MDC 06 (Diseases & Disorders of the Digestive System). Inpatient cases group to DRG 384 when the ICD-10-CM principal diagnosis is one of the 9 codes listed below and no secondary diagnosis on the MCC list is present. Its FY 2026 relative weight is 0.8548 with a geometric mean length of stay of 2.4 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
0.8548
Relative Weight
2.4
Geometric Mean LOS (days)
3.0
Arithmetic Mean LOS (days)
9
Principal Diagnosis Codes

Severity family

DRG 383with MCCWeight 1.3807 · GMLOS 3.9 daysDRG 384without MCCWeight 0.8548 · GMLOS 2.4 days
How a case is assigned to DRG 384

The grouper first assigns the case to MDC 06 from the principal diagnosis and finds no qualifying operating-room procedure (this is a Medical DRG; ICD-10-PCS codes do not drive assignment here), then applies the severity split from secondary diagnoses: with MCC → 383; without MCC → 384.

ICD-10-CM

Principal Diagnosis Codes 9 codes · 3 categories

K25 Gastric ulcer3 codes
  • K25.3 Acute gastric ulcer without hemorrhage or perforation
  • K25.7 Chronic gastric ulcer without hemorrhage or perforation
  • K25.9 Gastric ulcer, unspecified as acute or chronic, without hemorrhage or perforation
K26 Duodenal ulcer3 codes
  • K26.3 Acute duodenal ulcer without hemorrhage or perforation
  • K26.7 Chronic duodenal ulcer without hemorrhage or perforation
  • K26.9 Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation
K27 Peptic ulcer, site unspecified3 codes
  • K27.3 Acute peptic ulcer, site unspecified, without hemorrhage or perforation
  • K27.7 Chronic peptic ulcer, site unspecified, without hemorrhage or perforation
  • K27.9 Peptic ulcer, site unspecified, unspecified as acute or chronic, without hemorrhage or perforation
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 384 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 384?

MS-DRG 384 (Uncomplicated Peptic Ulcer without MCC) is a medical DRG in MDC 06 (Diseases & Disorders of the Digestive System). Its FY 2026 relative weight is 0.8548 with a geometric mean length of stay of 2.4 days.

What is the difference between DRG 383, 384?

All 2 share the same base category; the severity of secondary diagnoses separates them: 383 (with MCC), 384 (without MCC). A major complication or comorbidity (MCC) places the case in the highest-weighted DRG of the family; a CC in the middle; neither in the lowest.

How many diagnosis codes group to DRG 384?

9 ICD-10-CM principal diagnosis codes group to this DRG, spanning 3 three-character categories.

What is the relative weight of DRG 384?

The FY 2026 relative weight of this DRG is 0.8548, meaning reimbursement of roughly 0.85 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

← PreviousDRG 383 – Uncomplicated Peptic Ulcer with MCC
Source: CMS ICD-10 MS-DRG v43.0 Definitions Manual and the FY 2026 IPPS Final Rule (Table 5), effective October 1, 2025 through September 30, 2026. We publish the DRG assignments as CMS defines them and add the navigation, search, and code links.