MS-DRG v44.0 · MDC 04: Diseases and Disorders of the Respiratory System
183 — Major Chest Trauma with MCC
Source: CMS MS-DRG v44.0 and FY2027 IPPS final rule. Page updated September 29, 2026.
- Relative weight
- 1.4903
- Geometric mean LOS
- 4.1 days
- Arithmetic mean LOS
- 5.2 days
- Type
- Medical
About MS-DRG 183
MS-DRG 183, Major Chest Trauma with MCC, is a medical DRG in MDC 04 (Diseases and Disorders of the Respiratory System) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.4903, so Medicare's base payment for this DRG is about 1.49 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 4.1 days and the arithmetic mean is 5.2 days.
It belongs to a 3-level severity family: DRG 183 (with MCC, weight 1.4903), DRG 184 (with CC, weight 1.0647) and DRG 185 (without CC/MCC, weight 0.7715). The highest-severity level carries 1.9 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
61 ICD-10-CM diagnosis codes are part of this DRG's grouping logic; they are listed below.
ICD-10-CM codes that group to DRG 183 (61)
Chapter 13: Diseases of the musculoskeletal system and connective tissue
Chapter 19: Injury, poisoning and certain other consequences of external causes
- S11.021ALaceration without foreign body of trachea, initial encounter
- S11.022ALaceration with foreign body of trachea, initial encounter
- S11.023APuncture wound without foreign body of trachea, initial encounter
- S11.024APuncture wound with foreign body of trachea, initial encounter
- S11.025AOpen bite of trachea, initial encounter
- S11.029AUnspecified open wound of trachea, initial encounter
- S22.31XBFracture of one rib, right side, initial encounter for open fracture
- S22.32XBFracture of one rib, left side, initial encounter for open fracture
- S22.39XBFracture of one rib, unspecified side, initial encounter for open fracture
- S22.41XAMultiple fractures of ribs, right side, initial encounter for closed fracture
- S22.41XBMultiple fractures of ribs, right side, initial encounter for open fracture
- S22.42XAMultiple fractures of ribs, left side, initial encounter for closed fracture
- S22.42XBMultiple fractures of ribs, left side, initial encounter for open fracture
- S22.43XAMultiple fractures of ribs, bilateral, initial encounter for closed fracture
- S22.43XBMultiple fractures of ribs, bilateral, initial encounter for open fracture
- S22.49XAMultiple fractures of ribs, unspecified side, initial encounter for closed fracture
- S22.49XBMultiple fractures of ribs, unspecified side, initial encounter for open fracture
- S22.5XXAFlail chest, initial encounter for closed fracture
- S22.5XXBFlail chest, initial encounter for open fracture
- S27.331ALaceration of lung, unilateral, initial encounter
- S27.332ALaceration of lung, bilateral, initial encounter
- S27.339ALaceration of lung, unspecified, initial encounter
- S27.401AUnspecified injury of bronchus, unilateral, initial encounter
- S27.402AUnspecified injury of bronchus, bilateral, initial encounter
- S27.409AUnspecified injury of bronchus, unspecified, initial encounter
- S27.411APrimary blast injury of bronchus, unilateral, initial encounter
- S27.412APrimary blast injury of bronchus, bilateral, initial encounter
- S27.419APrimary blast injury of bronchus, unspecified, initial encounter
- S27.421AContusion of bronchus, unilateral, initial encounter
- S27.422AContusion of bronchus, bilateral, initial encounter
- S27.429AContusion of bronchus, unspecified, initial encounter
- S27.431ALaceration of bronchus, unilateral, initial encounter
- S27.432ALaceration of bronchus, bilateral, initial encounter
- S27.439ALaceration of bronchus, unspecified, initial encounter
- S27.491AOther injury of bronchus, unilateral, initial encounter
- S27.492AOther injury of bronchus, bilateral, initial encounter
- S27.499AOther injury of bronchus, unspecified, initial encounter
- S27.802AContusion of diaphragm, initial encounter
- S27.803ALaceration of diaphragm, initial encounter
- S27.808AOther injury of diaphragm, initial encounter
- S27.809AUnspecified injury of diaphragm, initial encounter
- S43.201AUnspecified subluxation of right sternoclavicular joint, initial encounter
- S43.202AUnspecified subluxation of left sternoclavicular joint, initial encounter
- S43.203AUnspecified subluxation of unspecified sternoclavicular joint, initial encounter
- S43.204AUnspecified dislocation of right sternoclavicular joint, initial encounter
- S43.205AUnspecified dislocation of left sternoclavicular joint, initial encounter
- S43.206AUnspecified dislocation of unspecified sternoclavicular joint, initial encounter
- S43.211AAnterior subluxation of right sternoclavicular joint, initial encounter
- S43.212AAnterior subluxation of left sternoclavicular joint, initial encounter
- S43.213AAnterior subluxation of unspecified sternoclavicular joint, initial encounter
- S43.214AAnterior dislocation of right sternoclavicular joint, initial encounter
- S43.215AAnterior dislocation of left sternoclavicular joint, initial encounter
- S43.216AAnterior dislocation of unspecified sternoclavicular joint, initial encounter
- S43.221APosterior subluxation of right sternoclavicular joint, initial encounter
- S43.222APosterior subluxation of left sternoclavicular joint, initial encounter
- S43.223APosterior subluxation of unspecified sternoclavicular joint, initial encounter
- S43.224APosterior dislocation of right sternoclavicular joint, initial encounter
- S43.225APosterior dislocation of left sternoclavicular joint, initial encounter
- S43.226APosterior dislocation of unspecified sternoclavicular joint, initial encounter
Common questions about DRG 183
What is the relative weight of DRG 183?
- 1.4903 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 183?
- The geometric mean length of stay is 4.1 days; the arithmetic mean is 5.2 days.
Is DRG 183 medical or surgical?
- DRG 183 is a medical DRG.