MS-DRG 945: REHABILITATION WITH CC/MCC

DRGMedicalMDC 23

MS-DRG 945 is rehabilitation with cc/mcc, in MDC 23 (a medical DRG), at the with-CC (complication or comorbidity) level. Its FY2027 relative weight is 1.4749, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 5.70 days. 2 ICD-10-CM principal diagnoses group into MS-DRGs 945–946 under the CMS definitions manual; the most-searched are listed below.

FY2027 payment factors

Relative weight: 1.4749
Geometric mean LOS: 5.70
Arithmetic mean LOS: 7.70
Post-acute transfer: Yes

This DRG is subject to the post-acute care transfer policy: a discharge to a qualifying setting below the mean length of stay is paid per diem rather than in full.

Principal diagnoses that group to MS-DRGs 945–946

From the CMS MS-DRG definitions manual’s principal-diagnosis index: 2 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 945–946 the case lands in. The 2 most-searched:

Z44.8Encounter for fitting and adjustment of other external prosthetic devices
Z44.9Encounter for fitting and adjustment of unspecified external prosthetic device

The severity splits

Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 945.

945	REHABILITATION WITH CC/MCC	1.4749
946	REHABILITATION WITHOUT CC/MCC	1.1051	-0.3698

All FY2027 MS-DRGs · MDC 23