MS-DRG · FY 2026 v43.0

MS-DRG 189 – Pulmonary Edema and Respiratory Failure

A Medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Inpatient cases group to DRG 189 when the ICD-10-CM principal diagnosis is one of the 22 codes listed below. Its FY 2026 relative weight is 1.2354 with a geometric mean length of stay of 3.5 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
1.2354
Relative Weight
3.5
Geometric Mean LOS (days)
4.7
Arithmetic Mean LOS (days)
22
Principal Diagnosis Codes
How a case is assigned to DRG 189

The grouper first assigns the case to MDC 04 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).

ICD-10-CM

Principal Diagnosis Codes 22 codes · 6 categories

22 of 22 shown
J18 Pneumonia, unspecified organism1 code
  • J18.2 Hypostatic pneumonia, unspecified organism
J68 Respiratory conditions due to inhalation of chemicals, gases, fumes and vapors1 code
  • J68.1 Pulmonary edema due to chemicals, gases, fumes and vapors
J80 Acute respiratory distress syndrome1 code
  • J80 Acute respiratory distress syndrome
J81 Pulmonary edema2 codes
  • J81.0 Acute pulmonary edema
  • J81.1 Chronic pulmonary edema
J95 Intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified5 codes
  • J95.1 Acute pulmonary insufficiency following thoracic surgery
  • J95.2 Acute pulmonary insufficiency following nonthoracic surgery
  • J95.3 Chronic pulmonary insufficiency following surgery
  • J95.821 Acute postprocedural respiratory failure
  • J95.822 Acute and chronic postprocedural respiratory failure
J96 Respiratory failure, not elsewhere classified12 codes
  • J96.00 Acute respiratory failure, unspecified whether with hypoxia or hypercapnia
  • J96.01 Acute respiratory failure with hypoxia
  • J96.02 Acute respiratory failure with hypercapnia
  • J96.10 Chronic respiratory failure, unspecified whether with hypoxia or hypercapnia
  • J96.11 Chronic respiratory failure with hypoxia
  • J96.12 Chronic respiratory failure with hypercapnia
  • J96.20 Acute and chronic respiratory failure, unspecified whether with hypoxia or hypercapnia
  • J96.21 Acute and chronic respiratory failure with hypoxia
  • J96.22 Acute and chronic respiratory failure with hypercapnia
  • J96.90 Respiratory failure, unspecified, unspecified whether with hypoxia or hypercapnia
  • J96.91 Respiratory failure, unspecified with hypoxia
  • J96.92 Respiratory failure, unspecified with hypercapnia
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 189 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 189?

MS-DRG 189 (Pulmonary Edema and Respiratory Failure) is a medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Its FY 2026 relative weight is 1.2354 with a geometric mean length of stay of 3.5 days.

How many diagnosis codes group to DRG 189?

22 ICD-10-CM principal diagnosis codes group to this DRG, spanning 6 three-character categories.

What is the relative weight of DRG 189?

The FY 2026 relative weight of this DRG is 1.2354, meaning reimbursement of roughly 1.24 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

← PreviousDRG 188 – Pleural Effusion without CC/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.