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Table 6 CMS Categorization of the Case Mix Groups (CMG) (M-Motor, C-Cognitive, A-Age)

From: Inpatient rehabilitation service utilization and outcomes under US ACA Medicaid expansion

Stroke

Hip Fracture

Joint Replacement

CMG101

Stroke M > 51.05

CMG701

Fracture of lower extremity M > 42.15

CMG801

Replacement of lower extremity joint M > 49.55

102

Stroke M > 44.45 and M < 51.05 and C > 18.5

702

Fracture of lower extremity M > 34.15 and M < 42.15

802

Replacement of lower extremity joint M > 37.05 and M < 49.55

103

Stroke M > 44.45 and M < 51.05 and C < 18.5

703

Fracture of lower extremity M > 28.15 and M < 34.15

803

Replacement of lower extremity joint M > 28.65 and M < 37.05 and A > 83.5

104

Stroke M > 38.85 and M < 44.45

704

Fracture of lower extremity M < 28.15

804

Replacement of lower extremity joint M > 28.65 and M < 37.05 and A < 83.5

105

Stroke M > 34.25 and M < 38.85

5001

Short-stay cases, length of stay is 3 days or fewer

805

Replacement of lower extremity joint M > 22.05 and M < 28.65

106

Stroke M > 30.05 and M < 34.25

5101

Expired, orthopedic, length of stay is 13 days or fewer

806

Replacement of lower extremity joint M < 22.05

107

Stroke M > 26.15 and M < 30.05

  

5001

Short-stay cases, length of stay is 3 days or fewer

108

Stroke M < 26.15 and A > 84.5

  

5101

Expired, orthopedic, length of stay is 13 days or fewer

109

Stroke M > 22.35 and M < 26.15 and A < 84.5

    

110

Stroke M < 22.35 and A < 84.5

    

5001

Short-stay cases, length of stay is 3 days or fewer