MS-DRG · FY 2026 v43.0

MS-DRG 205 – Other Respiratory System Diagnoses with MCC

A Medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Inpatient cases group to DRG 205 when the ICD-10-CM principal diagnosis is one of the 209 codes listed below and a secondary diagnosis on the major complication or comorbidity (MCC) list is present. Its FY 2026 relative weight is 1.8310 with a geometric mean length of stay of 4.4 days.

Medical DRG – assigned by principal diagnosis✓ Official CMS v43.0 dataset
1.8310
Relative Weight
4.4
Geometric Mean LOS (days)
6.0
Arithmetic Mean LOS (days)
209
Principal Diagnosis Codes

Severity family

DRG 205with MCCWeight 1.8310 · GMLOS 4.4 daysDRG 206without MCCWeight 0.9411 · GMLOS 2.4 days
How a case is assigned to DRG 205

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), then applies the severity split from secondary diagnoses: with MCC → 205; without MCC → 206.

ICD-10-CM

Principal Diagnosis Codes 209 codes · 27 categories

209 of 209 shown
E66 Overweight and obesity1 code
  • E66.2 Morbid (severe) obesity with alveolar hypoventilation
J22 Unspecified acute lower respiratory infection1 code
  • J22 Unspecified acute lower respiratory infection
J68 Respiratory conditions due to inhalation of chemicals, gases, fumes and vapors3 codes
  • J68.0 Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
  • J68.2 Upper respiratory inflammation due to chemicals, gases, fumes and vapors, not elsewhere classified
  • J68.3 Other acute and subacute respiratory conditions due to chemicals, gases, fumes and vapors
J70 Respiratory conditions due to other external agents7 codes
  • J70.0 Acute pulmonary manifestations due to radiation
  • J70.2 Acute drug-induced interstitial lung disorders
  • J70.3 Chronic drug-induced interstitial lung disorders
  • J70.4 Drug-induced interstitial lung disorders, unspecified
  • J70.5 Respiratory conditions due to smoke inhalation
  • J70.8 Respiratory conditions due to other specified external agents
  • J70.9 Respiratory conditions due to unspecified external agent
J95 Intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified14 codes
  • J95.00 Unspecified tracheostomy complication
  • J95.01 Hemorrhage from tracheostomy stoma
  • J95.02 Infection of tracheostomy stoma
  • J95.03 Malfunction of tracheostomy stoma
  • J95.04 Tracheo-esophageal fistula following tracheostomy
  • J95.09 Other tracheostomy complication
  • J95.4 Chemical pneumonitis due to anesthesia
  • J95.5 Postprocedural subglottic stenosis
  • J95.84 Transfusion-related acute lung injury (TRALI)
  • J95.851 Ventilator associated pneumonia
  • J95.859 Other complication of respirator [ventilator]
  • J95.87 Transfusion-associated dyspnea (TAD)
  • J95.88 Other intraoperative complications of respiratory system, not elsewhere classified
  • J95.89 Other postprocedural complications and disorders of respiratory system, not elsewhere classified
J98 Other respiratory disorders7 codes
  • J98.11 Atelectasis
  • J98.19 Other pulmonary collapse
  • J98.3 Compensatory emphysema
  • J98.4 Other disorders of lung
  • J98.6 Disorders of diaphragm
  • J98.8 Other specified respiratory disorders
  • J98.9 Respiratory disorder, unspecified
K76 Other diseases of liver1 code
  • K76.81 Hepatopulmonary syndrome
M94 Other disorders of cartilage1 code
  • M94.0 Chondrocostal junction syndrome [Tietze]
N80 Endometriosis5 codes
  • N80.B1 Endometriosis of pleura
  • N80.B2 Endometriosis of lung
  • N80.B31 Superficial endometriosis of diaphragm
  • N80.B32 Deep endometriosis of diaphragm
  • N80.B39 Endometriosis of diaphragm, unspecified depth
Q33 Congenital malformations of lung8 codes
  • Q33.0 Congenital cystic lung
  • Q33.1 Accessory lobe of lung
  • Q33.2 Sequestration of lung
  • Q33.3 Agenesis of lung
  • Q33.5 Ectopic tissue in lung
  • Q33.6 Congenital hypoplasia and dysplasia of lung
  • Q33.8 Other congenital malformations of lung
  • Q33.9 Congenital malformation of lung, unspecified
Q34 Other congenital malformations of respiratory system4 codes
  • Q34.0 Anomaly of pleura
  • Q34.1 Congenital cyst of mediastinum
  • Q34.8 Other specified congenital malformations of respiratory system
  • Q34.9 Congenital malformation of respiratory system, unspecified
Q79 Congenital malformations of musculoskeletal system, not elsewhere classified2 codes
  • Q79.0 Congenital diaphragmatic hernia
  • Q79.1 Other congenital malformations of diaphragm
R09 Other symptoms and signs involving the circulatory and respiratory system3 codes
R68 Other general symptoms and signs1 code
  • R68.3 Clubbing of fingers
R91 Abnormal findings on diagnostic imaging of lung1 code
  • R91.1 Solitary pulmonary nodule
R94 Abnormal results of function studies1 code
  • R94.2 Abnormal results of pulmonary function studies
S22 Fracture of rib(s), sternum and thoracic spine3 codes
  • S22.31XA Fracture of one rib, right side, initial encounter for closed fracture
  • S22.32XA Fracture of one rib, left side, initial encounter for closed fracture
  • S22.39XA Fracture of one rib, unspecified side, initial encounter for closed fracture
S23 Dislocation and sprain of joints and ligaments of thorax5 codes
  • S23.41XA Sprain of ribs, initial encounter
  • S23.420A Sprain of sternoclavicular (joint) (ligament), initial encounter
  • S23.421A Sprain of chondrosternal joint, initial encounter
  • S23.428A Other sprain of sternum, initial encounter
  • S23.429A Unspecified sprain of sternum, initial encounter
S26 Injury of heart14 codes
  • S26.00XS Unspecified injury of heart with hemopericardium, sequela
  • S26.01XS Contusion of heart with hemopericardium, sequela
  • S26.020S Mild laceration of heart with hemopericardium, sequela
  • S26.021S Moderate laceration of heart with hemopericardium, sequela
  • S26.022S Major laceration of heart with hemopericardium, sequela
  • S26.09XS Other injury of heart with hemopericardium, sequela
  • S26.10XS Unspecified injury of heart without hemopericardium, sequela
  • S26.11XS Contusion of heart without hemopericardium, sequela
  • S26.12XS Laceration of heart without hemopericardium, sequela
  • S26.19XS Other injury of heart without hemopericardium, sequela
  • S26.90XS Unspecified injury of heart, unspecified with or without hemopericardium, sequela
  • S26.91XS Contusion of heart, unspecified with or without hemopericardium, sequela
  • S26.92XS Laceration of heart, unspecified with or without hemopericardium, sequela
  • S26.99XS Other injury of heart, unspecified with or without hemopericardium, sequela
S27 Injury of other and unspecified intrathoracic organs78 codes
  • S27.0XXS Traumatic pneumothorax, sequela
  • S27.1XXS Traumatic hemothorax, sequela
  • S27.2XXS Traumatic hemopneumothorax, sequela
  • S27.301A Unspecified injury of lung, unilateral, initial encounter
  • S27.301S Unspecified injury of lung, unilateral, sequela
  • S27.302A Unspecified injury of lung, bilateral, initial encounter
  • S27.302S Unspecified injury of lung, bilateral, sequela
  • S27.309A Unspecified injury of lung, unspecified, initial encounter
  • S27.309S Unspecified injury of lung, unspecified, sequela
  • S27.311A Primary blast injury of lung, unilateral, initial encounter
  • S27.311S Primary blast injury of lung, unilateral, sequela
  • S27.312A Primary blast injury of lung, bilateral, initial encounter
  • S27.312S Primary blast injury of lung, bilateral, sequela
  • S27.319A Primary blast injury of lung, unspecified, initial encounter
  • S27.319S Primary blast injury of lung, unspecified, sequela
  • S27.321A Contusion of lung, unilateral, initial encounter
  • S27.321S Contusion of lung, unilateral, sequela
  • S27.322A Contusion of lung, bilateral, initial encounter
  • S27.322S Contusion of lung, bilateral, sequela
  • S27.329A Contusion of lung, unspecified, initial encounter
  • S27.329S Contusion of lung, unspecified, sequela
  • S27.331S Laceration of lung, unilateral, sequela
  • S27.332S Laceration of lung, bilateral, sequela
  • S27.339S Laceration of lung, unspecified, sequela
  • S27.391A Other injuries of lung, unilateral, initial encounter
  • S27.391S Other injuries of lung, unilateral, sequela
  • S27.392A Other injuries of lung, bilateral, initial encounter
  • S27.392S Other injuries of lung, bilateral, sequela
  • S27.399A Other injuries of lung, unspecified, initial encounter
  • S27.399S Other injuries of lung, unspecified, sequela
  • S27.401S Unspecified injury of bronchus, unilateral, sequela
  • S27.402S Unspecified injury of bronchus, bilateral, sequela
  • S27.409S Unspecified injury of bronchus, unspecified, sequela
  • S27.411S Primary blast injury of bronchus, unilateral, sequela
  • S27.412S Primary blast injury of bronchus, bilateral, sequela
  • S27.419S Primary blast injury of bronchus, unspecified, sequela
  • S27.421S Contusion of bronchus, unilateral, sequela
  • S27.422S Contusion of bronchus, bilateral, sequela
  • S27.429S Contusion of bronchus, unspecified, sequela
  • S27.431S Laceration of bronchus, unilateral, sequela
  • S27.432S Laceration of bronchus, bilateral, sequela
  • S27.439S Laceration of bronchus, unspecified, sequela
  • S27.491S Other injury of bronchus, unilateral, sequela
  • S27.492S Other injury of bronchus, bilateral, sequela
  • S27.499S Other injury of bronchus, unspecified, sequela
  • S27.50XA Unspecified injury of thoracic trachea, initial encounter
  • S27.50XS Unspecified injury of thoracic trachea, sequela
  • S27.51XA Primary blast injury of thoracic trachea, initial encounter
  • S27.51XS Primary blast injury of thoracic trachea, sequela
  • S27.52XA Contusion of thoracic trachea, initial encounter
  • S27.52XS Contusion of thoracic trachea, sequela
  • S27.53XA Laceration of thoracic trachea, initial encounter
  • S27.53XS Laceration of thoracic trachea, sequela
  • S27.59XA Other injury of thoracic trachea, initial encounter
  • S27.59XS Other injury of thoracic trachea, sequela
  • S27.60XA Unspecified injury of pleura, initial encounter
  • S27.60XS Unspecified injury of pleura, sequela
  • S27.63XA Laceration of pleura, initial encounter
  • S27.63XS Laceration of pleura, sequela
  • S27.69XA Other injury of pleura, initial encounter
  • S27.69XS Other injury of pleura, sequela
  • S27.802S Contusion of diaphragm, sequela
  • S27.803S Laceration of diaphragm, sequela
  • S27.808S Other injury of diaphragm, sequela
  • S27.809S Unspecified injury of diaphragm, sequela
  • S27.812S Contusion of esophagus (thoracic part), sequela
  • S27.813S Laceration of esophagus (thoracic part), sequela
  • S27.818S Other injury of esophagus (thoracic part), sequela
  • S27.819S Unspecified injury of esophagus (thoracic part), sequela
  • S27.892A Contusion of other specified intrathoracic organs, initial encounter
  • S27.892S Contusion of other specified intrathoracic organs, sequela
  • S27.893A Laceration of other specified intrathoracic organs, initial encounter
  • S27.893S Laceration of other specified intrathoracic organs, sequela
  • S27.898A Other injury of other specified intrathoracic organs, initial encounter
  • S27.898S Other injury of other specified intrathoracic organs, sequela
  • S27.899A Unspecified injury of other specified intrathoracic organs, initial encounter
  • S27.899S Unspecified injury of other specified intrathoracic organs, sequela
  • S27.9XXS Injury of unspecified intrathoracic organ, sequela
T17 Foreign body in respiratory tract32 codes
  • T17.400A Unspecified foreign body in trachea causing asphyxiation, initial encounter
  • T17.408A Unspecified foreign body in trachea causing other injury, initial encounter
  • T17.410A Gastric contents in trachea causing asphyxiation, initial encounter
  • T17.418A Gastric contents in trachea causing other injury, initial encounter
  • T17.420A Food in trachea causing asphyxiation, initial encounter
  • T17.428A Food in trachea causing other injury, initial encounter
  • T17.490A Other foreign object in trachea causing asphyxiation, initial encounter
  • T17.498A Other foreign object in trachea causing other injury, initial encounter
  • T17.500A Unspecified foreign body in bronchus causing asphyxiation, initial encounter
  • T17.508A Unspecified foreign body in bronchus causing other injury, initial encounter
  • T17.510A Gastric contents in bronchus causing asphyxiation, initial encounter
  • T17.518A Gastric contents in bronchus causing other injury, initial encounter
  • T17.520A Food in bronchus causing asphyxiation, initial encounter
  • T17.528A Food in bronchus causing other injury, initial encounter
  • T17.590A Other foreign object in bronchus causing asphyxiation, initial encounter
  • T17.598A Other foreign object in bronchus causing other injury, initial encounter
  • T17.800A Unspecified foreign body in other parts of respiratory tract causing asphyxiation, initial encounter
  • T17.808A Unspecified foreign body in other parts of respiratory tract causing other injury, initial encounter
  • T17.810A Gastric contents in other parts of respiratory tract causing asphyxiation, initial encounter
  • T17.818A Gastric contents in other parts of respiratory tract causing other injury, initial encounter
  • T17.820A Food in other parts of respiratory tract causing asphyxiation, initial encounter
  • T17.828A Food in other parts of respiratory tract causing other injury, initial encounter
  • T17.890A Other foreign object in other parts of respiratory tract causing asphyxiation, initial encounter
  • T17.898A Other foreign object in other parts of respiratory tract causing other injury, initial encounter
  • T17.900A Unspecified foreign body in respiratory tract, part unspecified causing asphyxiation, initial encounter
  • T17.908A Unspecified foreign body in respiratory tract, part unspecified causing other injury, initial encounter
  • T17.910A Gastric contents in respiratory tract, part unspecified causing asphyxiation, initial encounter
  • T17.918A Gastric contents in respiratory tract, part unspecified causing other injury, initial encounter
  • T17.920A Food in respiratory tract, part unspecified causing asphyxiation, initial encounter
  • T17.928A Food in respiratory tract, part unspecified causing other injury, initial encounter
  • T17.990A Other foreign object in respiratory tract, part unspecified in causing asphyxiation, initial encounter
  • T17.998A Other foreign object in respiratory tract, part unspecified causing other injury, initial encounter
T27 Burn and corrosion of respiratory tract8 codes
  • T27.0XXA Burn of larynx and trachea, initial encounter
  • T27.1XXA Burn involving larynx and trachea with lung, initial encounter
  • T27.2XXA Burn of other parts of respiratory tract, initial encounter
  • T27.3XXA Burn of respiratory tract, part unspecified, initial encounter
  • T27.4XXA Corrosion of larynx and trachea, initial encounter
  • T27.5XXA Corrosion involving larynx and trachea with lung, initial encounter
  • T27.6XXA Corrosion of other parts of respiratory tract, initial encounter
  • T27.7XXA Corrosion of respiratory tract, part unspecified, initial encounter
T86 Complications of transplanted organs and tissue5 codes
  • T86.810 Lung transplant rejection
  • T86.811 Lung transplant failure
  • T86.812 Lung transplant infection
  • T86.818 Other complications of lung transplant
  • T86.819 Unspecified complication of lung transplant
U07 Emergency use of U071 code
  • U07.0 Vaping-related disorder
Z43 Encounter for attention to artificial openings1 code
  • Z43.0 Encounter for attention to tracheostomy
Z90 Acquired absence of organs, not elsewhere classified1 code
  • Z90.2 Acquired absence of lung [part of]
Z94 Transplanted organ and tissue status1 code
  • Z94.2 Lung transplant status
ICD-10-PCS

Procedure Codes

Procedure codes do not drive assignment for this DRG. DRG 205 is a Medical DRG, assigned from the principal diagnosis above.

Frequently Asked Questions

What is MS-DRG 205?

MS-DRG 205 (Other Respiratory System Diagnoses with MCC) is a medical DRG in MDC 04 (Diseases & Disorders of the Respiratory System). Its FY 2026 relative weight is 1.8310 with a geometric mean length of stay of 4.4 days.

What is the difference between DRG 205, 206?

All 2 share the same base category; the severity of secondary diagnoses separates them: 205 (with MCC), 206 (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 205?

209 ICD-10-CM principal diagnosis codes group to this DRG, spanning 27 three-character categories.

What is the relative weight of DRG 205?

The FY 2026 relative weight of this DRG is 1.8310, meaning reimbursement of roughly 1.83 times the average Medicare inpatient case. Multiply by a hospital's blended base rate for the approximate payment.

← PreviousDRG 204 – Respiratory Signs and Symptoms
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.