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  3. Diagnosis Codes in MS-DRG 185 - Major Chest Trauma Without CC/MCC

Diagnosis Codes in MS-DRG 185 - Major Chest Trauma Without CC/MCC

The Medicare Severity Diagnosis-Related Group (MS-DRG) is a patient classification system used to categorize hospital cases based on clinical similarity and expected resource use. MS-DRGs organize all possible principal diagnoses into mutually exclusive groups known as Major Diagnostic Categories (MDCs), which help determine reimbursement under the Medicare Inpatient Prospective Payment System.

This section lists the diagnosis codes included in MS-DRG V42.0: Major Chest Trauma without CC/MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 185

MS-DRG Title: Major Chest Trauma without CC/MCC

MCD: 04

Relative Weight: 0.7776 Relative Weight
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Geometric LOS: 0.78 Geometric Length of Stay
The geometric mean length of stay (GMLOS) is used by Medicare to calculate the reimbursement for patients whose medical treatment takes a much longer or shorter time than average.

Arithmetic LOS: 2.20 Arithmetic Length of Stay
The average length of stay (ALOS) reflects the average number of days a patient spends in a hospital for each admission.

  1. M96.A - Fracture of ribs, sternum and thorax associated with
  2. M99.1 - Subluxation complex (vertebral)
  3. S11.021 - Laceration without foreign body of trachea
  4. S11.022 - Laceration with foreign body of trachea
  5. S11.023 - Puncture wound without foreign body of trachea
  6. S11.024 - Puncture wound with foreign body of trachea
  7. S11.025 - Open bite of trachea
  8. S11.029 - Unspecified open wound of trachea
  9. S22.31 - Fracture of one rib, right side
  10. S22.32 - Fracture of one rib, left side
  11. S22.39 - Fracture of one rib, unspecified side
  12. S22.41 - Multiple fractures of ribs, right side
  13. S22.42 - Multiple fractures of ribs, left side
  14. S22.43 - Multiple fractures of ribs, bilateral
  15. S22.49 - Multiple fractures of ribs, unspecified side
  16. S22.5 - Flail chest
  17. S27.331 - Laceration of lung, unilateral
  18. S27.332 - Laceration of lung, bilateral
  19. S27.339 - Laceration of lung, unspecified
  20. S27.401 - Unspecified injury of bronchus, unilateral
  21. S27.402 - Unspecified injury of bronchus, bilateral
  22. S27.409 - Unspecified injury of bronchus, unspecified
  23. S27.411 - Primary blast injury of bronchus, unilateral
  24. S27.412 - Primary blast injury of bronchus, bilateral
  25. S27.419 - Primary blast injury of bronchus, unspecified
  26. S27.421 - Contusion of bronchus, unilateral
  27. S27.422 - Contusion of bronchus, bilateral
  28. S27.429 - Contusion of bronchus, unspecified
  29. S27.431 - Laceration of bronchus, unilateral
  30. S27.432 - Laceration of bronchus, bilateral
  31. S27.439 - Laceration of bronchus, unspecified
  32. S27.491 - Other injury of bronchus, unilateral
  33. S27.492 - Other injury of bronchus, bilateral
  34. S27.499 - Other injury of bronchus, unspecified
  35. S27.802 - Contusion of diaphragm
  36. S27.803 - Laceration of diaphragm
  37. S27.808 - Other injury of diaphragm
  38. S27.809 - Unspecified injury of diaphragm
  39. S43.201 - Unspecified subluxation of right sternoclavicular
  40. S43.202 - Unspecified subluxation of left sternoclavicular j
  41. S43.203 - Unspecified subluxation of unspecified sternoclavi
  42. S43.204 - Unspecified dislocation of right sternoclavicular
  43. S43.205 - Unspecified dislocation of left sternoclavicular j
  44. S43.206 - Unspecified dislocation of unspecified sternoclavi
  45. S43.211 - Anterior subluxation of right sternoclavicular joi
  46. S43.212 - Anterior subluxation of left sternoclavicular join
  47. S43.213 - Anterior subluxation of unspecified sternoclavicul
  48. S43.214 - Anterior dislocation of right sternoclavicular joi
  49. S43.215 - Anterior dislocation of left sternoclavicular join
  50. S43.216 - Anterior dislocation of unspecified sternoclavicul
  51. S43.221 - Posterior subluxation of right sternoclavicular jo
  52. S43.222 - Posterior subluxation of left sternoclavicular joi
  53. S43.223 - Posterior subluxation of unspecified sternoclavicu
  54. S43.224 - Posterior dislocation of right sternoclavicular jo
  55. S43.225 - Posterior dislocation of left sternoclavicular joi
  56. S43.226 - Posterior dislocation of unspecified sternoclavicu

  • M96.A - Fracture of ribs, sternum and thorax associated with compression of the chest and cardiopulmonary resuscitation

    • M96.A4 - Flail chest associated with chest compression and cardiopulmonary resuscitation

  • M99.1 - Subluxation complex (vertebral)

    • M99.18 - Subluxation complex (vertebral) of rib cage

  • S11.021 - Laceration without foreign body of trachea

    • S11.021A - Laceration without foreign body of trachea, initial encounter

  • S11.022 - Laceration with foreign body of trachea

    • S11.022A - Laceration with foreign body of trachea, initial encounter

  • S11.023 - Puncture wound without foreign body of trachea

    • S11.023A - Puncture wound without foreign body of trachea, initial encounter

  • S11.024 - Puncture wound with foreign body of trachea

    • S11.024A - Puncture wound with foreign body of trachea, initial encounter

  • S11.025 - Open bite of trachea

    • S11.025A - Open bite of trachea, initial encounter

  • S11.029 - Unspecified open wound of trachea

    • S11.029A - Unspecified open wound of trachea, initial encounter

  • S22.31 - Fracture of one rib, right side

    • S22.31XB - Fracture of one rib, right side, initial encounter for open fracture

  • S22.32 - Fracture of one rib, left side

    • S22.32XB - Fracture of one rib, left side, initial encounter for open fracture

  • S22.39 - Fracture of one rib, unspecified side

    • S22.39XB - Fracture of one rib, unspecified side, initial encounter for open fracture

  • S22.41 - Multiple fractures of ribs, right side

    • S22.41XA - Multiple fractures of ribs, right side, initial encounter for closed fracture

    • S22.41XB - Multiple fractures of ribs, right side, initial encounter for open fracture

  • S22.42 - Multiple fractures of ribs, left side

    • S22.42XA - Multiple fractures of ribs, left side, initial encounter for closed fracture

    • S22.42XB - Multiple fractures of ribs, left side, initial encounter for open fracture

  • S22.43 - Multiple fractures of ribs, bilateral

    • S22.43XA - Multiple fractures of ribs, bilateral, initial encounter for closed fracture

    • S22.43XB - Multiple fractures of ribs, bilateral, initial encounter for open fracture

  • S22.49 - Multiple fractures of ribs, unspecified side

    • S22.49XA - Multiple fractures of ribs, unspecified side, initial encounter for closed fracture

    • S22.49XB - Multiple fractures of ribs, unspecified side, initial encounter for open fracture

  • S22.5 - Flail chest

    • S22.5XXA - Flail chest, initial encounter for closed fracture

    • S22.5XXB - Flail chest, initial encounter for open fracture

  • S27.331 - Laceration of lung, unilateral

    • S27.331A - Laceration of lung, unilateral, initial encounter

  • S27.332 - Laceration of lung, bilateral

    • S27.332A - Laceration of lung, bilateral, initial encounter

  • S27.339 - Laceration of lung, unspecified

    • S27.339A - Laceration of lung, unspecified, initial encounter

  • S27.401 - Unspecified injury of bronchus, unilateral

    • S27.401A - Unspecified injury of bronchus, unilateral, initial encounter

  • S27.402 - Unspecified injury of bronchus, bilateral

    • S27.402A - Unspecified injury of bronchus, bilateral, initial encounter

  • S27.409 - Unspecified injury of bronchus, unspecified

    • S27.409A - Unspecified injury of bronchus, unspecified, initial encounter

  • S27.411 - Primary blast injury of bronchus, unilateral

    • S27.411A - Primary blast injury of bronchus, unilateral, initial encounter

  • S27.412 - Primary blast injury of bronchus, bilateral

    • S27.412A - Primary blast injury of bronchus, bilateral, initial encounter

  • S27.419 - Primary blast injury of bronchus, unspecified

    • S27.419A - Primary blast injury of bronchus, unspecified, initial encounter

  • S27.421 - Contusion of bronchus, unilateral

    • S27.421A - Contusion of bronchus, unilateral, initial encounter

  • S27.422 - Contusion of bronchus, bilateral

    • S27.422A - Contusion of bronchus, bilateral, initial encounter

  • S27.429 - Contusion of bronchus, unspecified

    • S27.429A - Contusion of bronchus, unspecified, initial encounter

  • S27.431 - Laceration of bronchus, unilateral

    • S27.431A - Laceration of bronchus, unilateral, initial encounter

  • S27.432 - Laceration of bronchus, bilateral

    • S27.432A - Laceration of bronchus, bilateral, initial encounter

  • S27.439 - Laceration of bronchus, unspecified

    • S27.439A - Laceration of bronchus, unspecified, initial encounter

  • S27.491 - Other injury of bronchus, unilateral

    • S27.491A - Other injury of bronchus, unilateral, initial encounter

  • S27.492 - Other injury of bronchus, bilateral

    • S27.492A - Other injury of bronchus, bilateral, initial encounter

  • S27.499 - Other injury of bronchus, unspecified

    • S27.499A - Other injury of bronchus, unspecified, initial encounter

  • S27.802 - Contusion of diaphragm

    • S27.802A - Contusion of diaphragm, initial encounter

  • S27.803 - Laceration of diaphragm

    • S27.803A - Laceration of diaphragm, initial encounter

  • S27.808 - Other injury of diaphragm

    • S27.808A - Other injury of diaphragm, initial encounter

  • S27.809 - Unspecified injury of diaphragm

    • S27.809A - Unspecified injury of diaphragm, initial encounter

  • S43.201 - Unspecified subluxation of right sternoclavicular joint

    • S43.201A - Unspecified subluxation of right sternoclavicular joint, initial encounter

  • S43.202 - Unspecified subluxation of left sternoclavicular joint

    • S43.202A - Unspecified subluxation of left sternoclavicular joint, initial encounter

  • S43.203 - Unspecified subluxation of unspecified sternoclavicular joint

    • S43.203A - Unspecified subluxation of unspecified sternoclavicular joint, initial encounter

  • S43.204 - Unspecified dislocation of right sternoclavicular joint

    • S43.204A - Unspecified dislocation of right sternoclavicular joint, initial encounter

  • S43.205 - Unspecified dislocation of left sternoclavicular joint

    • S43.205A - Unspecified dislocation of left sternoclavicular joint, initial encounter

  • S43.206 - Unspecified dislocation of unspecified sternoclavicular joint

    • S43.206A - Unspecified dislocation of unspecified sternoclavicular joint, initial encounter

  • S43.211 - Anterior subluxation of right sternoclavicular joint

    • S43.211A - Anterior subluxation of right sternoclavicular joint, initial encounter

  • S43.212 - Anterior subluxation of left sternoclavicular joint

    • S43.212A - Anterior subluxation of left sternoclavicular joint, initial encounter

  • S43.213 - Anterior subluxation of unspecified sternoclavicular joint

    • S43.213A - Anterior subluxation of unspecified sternoclavicular joint, initial encounter

  • S43.214 - Anterior dislocation of right sternoclavicular joint

    • S43.214A - Anterior dislocation of right sternoclavicular joint, initial encounter

  • S43.215 - Anterior dislocation of left sternoclavicular joint

    • S43.215A - Anterior dislocation of left sternoclavicular joint, initial encounter

  • S43.216 - Anterior dislocation of unspecified sternoclavicular joint

    • S43.216A - Anterior dislocation of unspecified sternoclavicular joint, initial encounter

  • S43.221 - Posterior subluxation of right sternoclavicular joint

    • S43.221A - Posterior subluxation of right sternoclavicular joint, initial encounter

  • S43.222 - Posterior subluxation of left sternoclavicular joint

    • S43.222A - Posterior subluxation of left sternoclavicular joint, initial encounter

  • S43.223 - Posterior subluxation of unspecified sternoclavicular joint

    • S43.223A - Posterior subluxation of unspecified sternoclavicular joint, initial encounter

  • S43.224 - Posterior dislocation of right sternoclavicular joint

    • S43.224A - Posterior dislocation of right sternoclavicular joint, initial encounter

  • S43.225 - Posterior dislocation of left sternoclavicular joint

    • S43.225A - Posterior dislocation of left sternoclavicular joint, initial encounter

  • S43.226 - Posterior dislocation of unspecified sternoclavicular joint

    • S43.226A - Posterior dislocation of unspecified sternoclavicular joint, initial encounter